BondTech Prusa i3 MK3S / MK2.5S Mosquito

The ultimate extruder upgrade for the Mosquito hotend on the Prusa

  • For Mosquito Hot-Ends
  • Better performance
  • Higher quality
  • Firmware upgrade required
  • $130.47 $144.99 -10%

All prices excl. VAT. Excludes delivery costs

In stock

Content: 1 pc

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Item no.: BTE-EXT-KIT-69, Content: 1 pc

EAN: 7350011410675

  • For Mosquito Hot-Ends
  • Better performance
  • Higher quality
  • Firmware upgrade required

Product information & technical details

Item no.: BTE-EXT-KIT-69
Manufacturer No.: EXT-KIT-69
Manufacturers: BondTech
Content: 1 pc
Product types: Extruder
Compatible with 3D Printers : Original Prusa i3 MK3S, Original Prusa i3 MK2.5S


A lightweight, high-resolution extruder upgrade for the popular Prusa i3 MK3S and MK2.5S 3D printers with optimised design for use with Mosquito and Mosquito Magnum hotends.


  • This upgrade kit does not include gears (already supplied by Prusa)
  • This upgrade does NOT include Mosquito Hotend
  • Additional parts must be installed for this upgrade kit ( X-Carriage Kit )

Upgrade your extruder
Upgrade your extruder to a Bondtech Mini Geared with a higher gear ratio (3: 1) for extra thrust and higher resolution.

Print faster or with higher quality
Use a lightweight extruder that allows your 3D printer to print faster or achieve better surface quality.

Reduce 3D printing problems
Reduce the risk of blockage and improve filament delivery.

Upgrade kit with optimized design for mosquito hotends
This is a Bondtech upgrade to the popular Prusa I3 MK3S and MK2.5S, which allow you to use the world-renowned Mosquito hotends.

Bondtech extruder for Prusa i3 MK2.5S & MK3S
This kit contains only the parts needed to convert your current extruder to the popular design. It is based on the BMI (Bondtech Mini Geared) extruder with a 3: 1 ratio for better precision and resolution, as well as optimized geometry for heat sink cooling and the professional SLS 3D printed housing.

  • Adapted to Prusa's new filament sensor and Mosquito hotends
  • Includes a Bondtech BMG extruder with a 3: 1 gear ratio
  • Optimized geometry for heat sink cooling
  • Less moving weight to reduce vibration and ghosting
  • Professional SLS 3D printed case and 3 other important parts

MK3S / MK3S Mosquito, what's the difference?

This upgrade kit is largely similar to the previous MK3S, with the main difference being that it was developed for the Mosquito and Mosquito Magnum hotends.

Prusa's Heater or Mosquito Heater, what should I use?

The upgrade is compatible with the thermistor and 40W heater included with the Prusa.
However, you also have the option to use a slice engineering thermistor and a 50 W heater.
We recommend the more efficient 50W heater for your Mosquito to achieve a stable operating temperature faster.

Updating the firmware
To use this upgrade in the MK2.5S / MK3S, the E-Steps and Z-Max must be updated. Check out the latest version of our firmware here.
We also supply firmware versions that are compatible with the Mosquito Thermistor. If you are using the Mosquito component, you should use the associated firmware.


Questions & Answers about BondTech Prusa i3 MK3S / MK2.5S Mosquito

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Customer Reviews

English reviews written for BondTech Prusa i3 MK3S / MK2.5S Mosquito

3 customer reviews in all languages

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4 reviews

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