Mosquito® Prime™ Hotend - 1.75 mm (Conduct)

Mosquito® Prime™ Hotend - 2.85 mm (Conduct)

Mosquito® Prime™ Hotend - 1.75 mm (Liquid)

Mosquito® Prime™ Hotend - 2.85 mm (Liquid)

Mosquito® Prime™ Hotend - 1.75 mm (LGX ACE)

Mosquito® Prime™ Hotend - 2.85 mm (LGX ACE)

Mosquito® Prime™ Hotend - 1.75 mm (LGX ACE) (Front View)

Mosquito® Prime™ Hotend - 2.85 mm (LGX ACE) (Front View)

Mosquito® Prime™ Air - 2.85 mm

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If you're not seeing the results we've promised within 30 days, you can send the product back for a full refund, replacement, or repair. Exclusions apply. See terms for full details.

Regular price: $1,576.99
Sale price: $1,576.99
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Experience Mosquito® Prime™, the world's highest volumetric flow rate hotend—the ultimate combination of speed and reliability built to save you time and money. Featuring advanced thermal engineering, structural rigidity, and world-class US-based support, Mosquito Prime delivers precise and consistent high-flow extrusion, ensuring high-quality prints every time.

Note: Mosquito Prime is delivered as a kit with your configuration of heaters and sensors pre-installed.

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Mosquito® Prime™ and Conduct™ Hotends

Health and Safety Warnings

General Machining and Fabrication Equipment Safety Warnings

WARNING: Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire, and/or serious injury.

SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE.

Work area safety:
1. Keep the work area clean and well-lit. Cluttered or dark areas invite accidents.
2. Do not operate 3D printers in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. 3D printers create heat which may ignite dust or fumes.
3. Keep children and bystanders away while operating a 3D printer.
4. Minimize distractions to maintain focus on your work. Distractions can cause you to lose control of the 3D printer.
Electrical safety:
1. 3D printer plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce the risk of electric shock.
2. Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges, and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
3. Do not expose 3D printers to damp, rain or wet conditions. Water entering a 3D printer will increase the risk of electric shock.
4. Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the 3D printer. Keep the cord away from heat, oil, sharp edges, or moving parts. Damaged or entangled cords increase the risk of electric shock.
5. When operating a 3D printer with an extension cord, only use cords suitable for the applicable power load. The use of a cord unsuitable for the applicable power load increases the risk of electric shock and fire.
Personal safety:
1. Stay alert, watch what you are doing, and use common sense when operating a 3D printer. Do not use a 3D printer while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating a 3D printer may result in serious personal injury.
2. Use personal protective equipment and wear it properly. Always wear eye protection.
3. Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a power source, picking up, or handling components of a 3D printer.
4. Remove all metal objects, adjusting key or wrench before turning the 3D printer on. A metal object, wrench, or key can conduct electricity as well as heat which may result in personal injury, equipment damage, or fire.
5. Do not overreach. Keep proper footing and balance at all times. This risks injury in unexpected situations.
6. Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts.
7. Devices for the collection and extraction of dust, when connected and properly used, can reduce, but do not eliminate, dust-related hazards.
3D printer use and care:
1. Do not force the 3D printer to perform beyond its rated power output or temperature capabilities. Use the correct 3D printer for your application.
2. Do not use the 3D printer if the power switch does not turn it on and off. Any 3D printer that cannot be controlled with the power switch is dangerous and must be repaired.
3. Disconnect the plug from the power source before making any adjustments, changing accessories, or storing the 3D printer. Failing to do so increases the risk of starting the power tool accidentally.
4. Store idle 3D printers out of the reach of children and do not allow persons unfamiliar with 3D printers or these instructions to operate the power tool. 3D printers are dangerous in the hands of untrained users.
5. Maintain the 3D printer. Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the 3D printer’s operation. If damaged, have the 3D printer repaired before use. Accidents can result from poorly maintained 3D printers.
6. Use the 3D printer, accessories, and nozzles, etc. in accordance with their instructions, taking into account the working conditions and the work to be performed. Use of the 3D printer for operations different from those intended could result in a hazardous situation.
Service:
1. Have your 3D printer serviced by a qualified repair person using only identical replacement parts.

Mosquito® Prime™ Hotends Safety Warnings

Adherence to Instructions:
1. This product comes with high-powered electronics. All installation and assembly instructions must be adhered to.
2. Installation and assembly instructions can be found at: https://support.sliceengineering.com/portal/en/kb/slice-engineering/assembly-instructions.
3. After reading the instructions, if you are still unsure of how to install and configure the Mosquito® Prime™ Hotend correctly, please contact our customer support team.
Plastic structural components in proximity to the hotend:
1. When installing the Mosquito® Prime™ Hotend in the 100W or 200W configuration, or any other Slice Engineering® hotend in a 100W or 200W configuration, all plastic structural components used between the hotend and the nearest linear guide rail:
  1. Must be made of a material with a Deflection Temperature at 0.45 MPa (per ISO 75) of at least 90°C
  2. Have solid infill to help dissipate heat
  3. Use solid metal threaded inserts, not helical inserts, where threads are required

Single 100W and Dual 100W Heater Installation:
1. Installation of a single 100W heater or installation of dual 100W heaters (i.e. 200W of total heating power) into the Mosquito® Prime™ Hotend should be performed by a professional 3D printer manufacturer or professional automation engineer.
2. Electrical current limitations of the 3d printer and its components must not be exceeded.
3. Temperatures can exceed 600°C, which can ignite plastic and cause third-degree burns if touched.
4. Use of attachments between the hotend and guide rail must be composed of metal structures to a metal recirculating ball bearing carriage riding on a metal guide rail.
5. Metal attachments must be configured such that excess heat generated in a failure scenario involving runaway heating combined with the malfunction of the heatsink fan, temperature sensor, or liquid cooling system can dissipate through the metal structure of said attachments reducing the risk of injury, fire, and damage to the 3D printer.
6. Attachment by plastic structures is prohibited if a single 100W heater is installed or dual 100W heaters are installed since plastic restricts the dissipation of heat, may soften and structurally fail, increasing the risk of injury, fire, and damage to the 3D printer.
7. Implementation of redundant temperature sensors is recommended.

Mosquito® Conduct™ Hotends Safety Warnings

Adherence to Instructions:
1. This product comes with high-powered electronics. All installation and assembly instructions must be adhered to.
2. Installation and assembly instructions can be found at: https://support.sliceengineering.com/portal/en/kb/slice-engineering/assembly-instructions.
3. After reading the instructions, if you are still unsure of how to install and configure the Mosquito® Conduct™ Hotend correctly, please contact our customer support team.
Installation:
1. Installation of any Mosquito® Conduct™ Hotend should be performed by a professional 3D printer manufacturer or professional automation engineer.
2. Electrical current limitations of the 3d printer and its components must not be exceeded
3. Temperatures can exceed 600°C, which can ignite plastic and cause third-degree burns if touched.
4. Use of attachments between the hotend and guide rail must be composed of metal structures to a metal recirculating ball bearing carriage riding on a metal guide rail.
5. Metal attachments must be configured such that excess heat generated in a failure scenario involving runaway heating combined with the malfunction of the heatsink fan, temperature sensor, or liquid cooling system can dissipate through the metal structure of said attachments reducing the risk of injury, fire, and damage to the 3D printer.
6. Attachment by plastic structures is prohibited since plastic restricts the dissipation of heat, may soften and structurally fail, increasing the risk of injury, fire, and damage to the 3D printer.
7. Implementation of redundant temperature sensors is recommended for Mosquito® Magnum+ Conduct™ hotends.

Limited Warranty, Limitations of Warranty and Disclaimer of Liability

LIMITED PRODUCT WARRANTY. Slice Engineering^® warrants that the Mosquito® Prime™ and Conduct^TM Hotends (the “Products”) will, at the time of purchase by the first retail purchaser (“End User”) from Slice Engineering or an authorized reseller, comply with the product specifications (the “Specifications”) published by SLICE ENGINEERING, LLC (“Slice” or the “Company”). This warranty is made only to the End User and is not assignable.

PRODUCT WARRANTY DISCLAIMER. LIMITATION OF DAMAGES. TO THE EXTENT PERMITTED BY LAW AND EXCEPT FOR THE EXPRESS LIMITED PRODUCT WARRANTY SET FORTH IN THIS AGREEMENT, SLICE MAKES NO (AND EXPRESSLY DISCLAIMS ALL) WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, WITH RESPECT TO THE PRODUCTS SUPPLIED UNDER THIS AGREEMENT, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, OR ARISING FROM COURSE OF PERFORMANCE, DEALING, USAGE OR TRADE. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, SLICE MAKES NO CLAIM, REPRESENTATION, OR WARRANTY OF ANY KIND AS TO THE UTILITY OF THE PRODUCTS FOR THE END USER’S INTENDED USES.

REMEDY FOR BREACH OF WARRANTY AND LIMITATION OF DAMAGES. If notified in writing of a valid warranty claim within three months of the date of purchase by the End User, Slice will, at its option, (i) correct the non-conforming Product so that it materially complies with the Specifications; (ii) provide a replacement Product; or (iii) terminate the Agreement and refund the purchase price paid for the Product. Slice shall not be obligated to correct, cure, or otherwise remedy any nonconformity or defect in the Product if the reseller from which End User purchased the Product or End User has made any changes whatsoever to the Product, if the Product has been misused or damaged in any respect, or if the End User has not reported to Slice the existence and nature of such nonconformity or defect promptly upon discovery thereof. If requested by Slice, the End User will return the affected Product to Slice in accordance with Slice’s instructions and at its expense; failure to return the affect Product as requested will be deemed to be a waiver of this warranty and the remedies herein. IN NO EVENT SHALL SLICE BE LIABLE FOR ANY PUNITIVE, RELIANCE, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING LOST REVENUE, LOST PROFITS, OR LOST SAVINGS) OR ANY AMOUNTS IN EXCESS OF THE PURCHASE PRICE OF THE PRODUCT, HOWEVER CAUSED AND UNDER ANY THEORY, EVEN IF IT HAS NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. This section states Slice’s entire liability and the End User’s sole and exclusive remedy for breach of warranty.

ASSUMPTION OF LIABILITY; RELEASE. 3D printers are useful machine tools when installed and used with Slice Engineering® hotends in accordance with proper safety protocols by 3D printer manufacturers and professional automation engineers. When configured with 100W heaters, the Mosquito® Prime™ and Conduct™ hotends are powerful industrial tools designed for installation and configuration by 3D printer manufacturers and professional automation engineers and are inherently dangerous. By installing and/or operating a Mosquito® Prime™ or Conduct™ Hotend, you agree to take responsibility for any and all risks associated with the installation and operation of the Mosquito® Prime™ or Conduct™ Hotend. You further irrevocably release and discharge Slice Engineering from any loss, expense, damages or liabilities, including third party claims or any injury (including death) of any person or damage to property, arising out of or resulting from your improper use of the products, failure to operate the 3D printer or Slice Engineering products in accordance with their instructions and your negligence or misconduct.

The limitations, disclaimers and releases included above are limited to the extent required under applicable law.

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Mosquito® Prime™ Accessories

GammaMaster® Nozzle

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Hear From Our Customers

❝Prime took our setup to the next level, delivering incredibly consistent, high-flow extrusion for precision manufacturing. Exactly what we needed for reliable, production-grade output and exceptional quality.❞

Ken - Medical Device Manufacturer

Proteor Printer (2).jpg__PID:bc892120-79ae-4635-b7d2-e8c94e95fdd5

Industry Use Case

Proteor Print advances digital manufacturing in orthotics and prosthetics with its ICARUS Series of 3D printers. From the compact ICARUS LITE to the large-format ICARUS PRO (700 × 500 × 1000 mm build area), these printers enable clinics to expand socket and O&P production in-house. The ICARUS platform pairs with the Mosquito® Prime Hotend to achieve high flow rates and maintain the thermal performance required for fast, reliable fabrication. Together, Proteor and Slice Engineering deliver a scalable, high-performance printing solution for modern O&P production.

Fast and Consistent Extrusion

Mosquito Prime sports a lengthy 61 mm melt zone where filament directly contacts the hot block, allowing for better heat transfer and consistent temperature distribution. Enabled by a unique dual heater configuration of 200 W, Prime melts filament fast for a maximum volumetric flow rate of up to 116 mm³/s, (516 g/hr), with PLA and 64 mm³/s, (280 g/hr) with TPU.

Building on Mosquito’s Legacy

As an extension of the Mosquito line of hotends, Mosquito Prime features a copper alloy hot block rated to 500°C for ultimate material compatibility and a rigid "roll cage" design for enhanced durability. The Mosquito’s signature Bimetallic Heat Break™ ensures efficient thermal isolation of the cold block to prevent filament clogging.

Additional Features and Benefits

Supports up to 2 temperature sensors
Compatible with RepRap, AP3X, and Vase style nozzles (M6 x 1.0 threads with a 7 mm thread length)
Compatible with the Mosquito Magnum+/Prime Convection Shield
100% Made in the USA

Technical Specifications

Mass	103–140 g
Cooling	Air, Liquid, or Conduction
Filament Diameter	1.75 mm or 2.85 mm
Temperature Rating	500°C
Maximum Flow Rate Capacity - PLA (1.4 mm nozzle)	116 mm³/s
Maximum Flow Rate Capacity - TPU (1.4 mm nozzle)	64 mm³/s
Nozzle Compatibility	M6x1 (7 mm thread length)
Maximum Heating Power	200 W (24 V)
Temperature Sensor Compatibility	15 mm length, ø3 mm
Number of Temperature Sensors	Up to 2
Manufacturing	Made in the USA

Hotend Comparisons

	Mosquito®	Mosquito® Magnum	Mosquito Magnum+®	Mosquito® Prime™
Max Flow Rate Capacity	35 mm³/s (156 g/hr)	40 mm³/s (179 g/hr)	90 mm³/s (402 g/hr)	116 mm³/s (516 g/hr)
Nozzle Orifice	0.2 – 0.8 mm	0.4 – 1.2 mm	0.4 – 1.8 mm	0.8 – 1.8 mm
Mass*	37 g	41 g	73 g	103 g
Overall Height*	41 mm	41 mm	60 mm	88 mm
Max Power	50 W	50 W	100 W	200 W
Filament Diameter	1.75 or 2.85 mm	1.75 mm	1.75 or 2.85 mm	1.75 or 2.85 mm

* Air-Cooled Version (1.75 mm); Mass/height includes the heat sink, heat break, & hot block

Downloads

Mosquito® Prime™ Maximum Practical Flow Rate Test

Mosquito® Prime™ Air STEP File

Mosquito® Prime™ Liquid STEP File

Mosquito® Prime™ Conduct STEP File

Design Guide for a Quick Release Mechanism for Mosquito Conduct

Frequently Asked Questions

What benefits does Mosquito Prime have compared to Mosquito Magnum+, beyond its ~30% greater maximum flow rate?

Prime offers more than increased flow-rate potential. In white papers, we focus on flow-rate potential because it is relatively straightforward to quantify with a test protocol that anyone can execute. When choosing between Magnum+ and Prime for your machine build, consider your application.

For example, when printing objects largely composed of thick, single walls and tall layers (e.g., prosthetics), Prime significantly outperforms Magnum+. Prime’s longer melt zone results in a more consistent temperature of the exiting plastic (reduced radial temperature gradient) at extreme flow rates with large-orifice nozzles (Ø1 and greater). Large parts with a dense infill benefit from Prime for the same reason. The plastic has more time to absorb heat in the longer melt zone, and the liquefying filament has a longer path to undergo shear. The shearing action exposes the faster-moving, cooler center to the heat.

Without undue backpressure, the gradually tapered melt zone of the Prime 2.85 hot block enhances shearing, mitigating the cool-center phenomenon that otherwise limits the flow rate potential with Ø2.85 filament.

What limits the flow rate potential of Mosquito Prime 2.85 hotends?

An important consideration with the 2.85 configuration of Prime is that when printing with stiff filaments, commercially available 2.85 extruders generally can’t push the filament hard enough to fully utilize the hotend's flow-rate potential.

The sectional area of the melt zone in our Ø2.85 heat breaks is 2.4 times that of our Ø1.75 heat breaks. Therefore, 2.4 times the extrusion force would be required to achieve the same hydrostatic pressure. Most modern commercially available Ø2.85 extruders are based on Ø1.75 extruder designs.

When chasing maximum flow rates with Ø2.85 extruders, a stronger motor or a custom extruder can reduce the hydrostatic pressure gap and enable somewhat higher flow rates than Prime 1.75 hotends can achieve.

How well does Mosquito Prime handle soft, flexible filaments?

Thermoplastic elastomer filaments such as TPU and PEBA with hardness below ~100 on the Shore A scale create a unique interplay between the hotend and extruder in terms of precision and flow rate potential. Mechanical engineering students are taught “you can’t push on a rope.” Well, FFF involves precisely pushing filament, and soft filaments behave like ropes when you push on them: they bulge and buckle.

With the right drive wheel pressure on the filament, a filament path with the right amount of clearance, minimal distance between the extruder’s drive wheels and the start of the hotend’s melt zone, and maximum filament diameter (i.e., Ø2.85), surprising precision and flow rates can be achieved with the softest filaments. If you’re building a machine to maximize flow rate with soft filaments, we recommend Ø2.85 filament and a Conduct or ACE variant of Mosquito Prime.