SKU: 68445867888

Bondtech Prusa i3 MK3S / MK2.5S Mosquito EXT-KIT-69

Sale price$133.20 Regular price$148.00
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

Bondtech Prusa i3 MK3S / MK2.5S Mosquito EXT-KIT-69Are you looking for a Bondtech Prusa MK3S Mosquito Upgrade in Australia? This Upgrade Kit does not include the gears (already supplied by Prusa). This Upgrade Kit requires extra parts to install (X Carriage Kit). You can buy it from us or you can download the STLs and 3D print them. Perfectly designed for the Slice Engineering Mosquito Mosquito Magnum Upgrade Your Extruder Upgrade your extruder to a Bondtech Mini Geared with higher gear ratio 3: 1

Are you looking for a Bondtech Prusa MK3S Mosquito Upgrade in Australia?

This Upgrade Kit does not include the gears (already supplied by Prusa).

This Upgrade Kit requires extra parts to install (X-Carriage Kit).
You can buy it from us or you can download the STLs and 3D print them.

 Perfectly designed for the Slice Engineering Mosquito/Mosquito Magnum

Upgrade Your Extruder

Upgrade your extruder to a Bondtech Mini Geared with higher gear ratio – 3:1 – that allows for extra push force and higher resolution.

Print Faster Or With Higher Quality

Use a lightweight extruder that will allow your 3D printer to print faster or to achieve better surface quality.

Reduce 3D Printing Issues

Decrease the risk of heat creep to avoid clogs and improve filament feeding to avoid slipping and deformation that cause under and over extrusion issues.

Upgrade kit With Optimized Design to fit Mosquito hotends

This is a Bondtech upgrade for the popular Prusa I3 MK3S and MK2.5S that will allow the use of the world-acclaimed Mosquito hotends.

Bondtech Extruder For Prusa i3 MK2.5S & MK3S

This kit contains only the necessary parts to convert your current extruder to our own popular design based upon our BMG (Bondtech Mini Geared) extruder with 3:1 gearing ratio for better precision and resolution together with optimized geometry for the heatsink cooling and professional SLS 3D printed housing.

Product Main Features

This extruder upgrade presents the following main features:

  • Adapted to fit Prusa’s new filament sensor and Mosquito hotends;
  • Includes one Bondtech’s BMG extruder with 3:1 gearing ratio;
  • Optimized geometry for heat-sink cooling;
  • Less moving weight to reduce vibration and ghosting;
  • Professional SLS 3D printed housing and 3 other key parts.

MK3S / MK3S Mosquito, What’s the difference?

This Upgrade Kit is mostly similar to the previous MK3S, with the main difference of having been designed to fit the Mosquito and Mosquito Magnum hotends.
Other differences come from the design changes that include:

  • An optimization of the cooling air channel to focus the airflow on the Mosquito’s heatsink. The channel is narrower.
  • This tighter space is also used to hold the hotend in place during nozzle changes, so the user can change the nozzle with a single hand.
  • The fan shroud was also redesigned to fit the Mosquito hotends.
  • We include in this kit a new part, the Mosquito hotend adapter, 3D printed with SLS.

Prusa’s Heater or Mosquito Heater, What should I use?

The Upgrade is compatible with the thermistor and 40w heater already supplied with the Prusa.
However, you also have the option of using Slice Engineering Mosquito thermistor and 50W heater.
We recommend the more efficient 50W heater for your Mosquito to reach a stable operating temperature faster.

  • If you have a Prusa i3 MK2.5S, buy the 12v Mosquito heater.
  • If you have a Prusa i3 MK3S, you should buy the 24v Mosquito heater.

Updating the Firmware

To use this upgrade in the MK2.5S / MK3S, the E-steps and Z_Max needs to be updated. Check out the latest version of our firmware here.
We are also supplying firmware versions compatible with the use of Mosquito’s thermistor.
If you are using this Mosquito’s component you should use the related firmware.


Community involvement

This is a co-development work with awesome guys in the Prusa Community like Chris Warkocki, Grégorie Saunier (Bear Upgrades), Olof Ogland, Erik Bjorgan, Josh Jones, Kyle Wiehe, Marc Evertz, Matt Harrison, Ocie Ward, Sando Bendig, Vecko Kojchevski (Vecko Extruder), Steven Mölby, and Yuri Delia that have provided excellent feedback and suggestions of how to develop the “perfect” extruder setup for the Prusa series printer. A lot of work has been put in this project and we tried to listen to all the inputs in order to find a solution that can be the best fit to the Prusa I3 MK3S.

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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 68445867888

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4.2 ★★★★★
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Valjean
Chelsea, US
★★★★★ 5
Arrived on time, in good condition, functioning as advertised.
Style: Data Transfer (10Gbps)
This was one of only three or four 4-port USB-C hubs I was able to find. The others IIRC were made by Acer, Belkin, and Rosewill. Of the four, only this one and the Belkin also had power-delivery capabilities, and this one was slightly cheaper. The cable is a little short, only about 17cm. This can be good or bad depending on your use case. Personally, I think it's adequate, as it's plugged into my monitor, so not having a bunch of extra cable to tie up is a good thing, although it's a little odd to have it partially hanging rather than sitting flat on my desk. Again, not a bad thing, because it's quite light, so nothing is being stressed. However, people who want to plug it into a port on the rear of a tower will most likely need to purchase a USB-C male-to-female cable extension, keeping in mind that to use this hub to it's full capability, you would need a USB4 certified extension rated for 40gbps data & 100w power delivery. Overall, I am pleased. I will most likely use this for a very long time, at least until USB-C completely replaces USB-A.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 20, 2025
K
Verified Purchase
Kelsey Rossette
Alexandria, US
★★★★★ 5
Perfect USB-C hub!
*If you are reading this and wondering if you should get it, or a competitor product that slightly lower in price... just get this one. You won't regret it.* I already wrote a review, but I forgot to add photos. 1) I couldn't find a hub that had more than 2 USB-C ports; 2) This thing is tiny, doesn't demand attention, and built with aluminum. Not plastic, and doesn't feel cheap; 3) a life saver. I took velcro and mounted the little sucker under my MacBook mount. Now I could plug in my external drives, SD reader, and use the ports on my computer for other peripherals. One thing I was worried about was transfer speeds. I don't expect the fastest speeds ever, but I don't want to regret my purchase if it was going to give me more of a headache than a solution. To my surprise, the transfer speeds are fast, and feel faster than when they were plugged directly into my computer. One hard drive in particular always gave me trouble mounting. it would take forever. Since I purchased this drive it mounts in seconds. I've used Satechi before, and their product have proven to me over and over to be reliable and of quality. *If you are reading this and wondering if you should get it, or a competitor product that slightly lower in price... just get this one. You won't regret it.*
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Reviewed in the United States on February 25, 2022
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Dr.Science
Lake Worth, US
★★★★★ 4
Works for me
This is plugged into a Macbook Air M2 and it supports a time machine drive, a 4TB solid state drive, a wired keyboard, and a free USB port for plugging various stuff into. In this use case, some other hubs don't work well with the Macbook; it keeps forgetting hub-linked drives are there, dropping them when asleep or not seeing them after a reboot. That has not been a problem with this hub. It's true I lose some of that Thunderbolt speed, but really, 5 GB/s is not that small a hole to put stuff through.
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Reviewed in the United States on November 23, 2023
M
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Morgan
Carnegie, US
★★★★★ 5
Leave the Laptop at Home - Content Backups
Style: Data Transfer (10Gbps)
I purchased this hub so I could leave the laptop at home and do backups of my GoPro Cameras and Drone footage to an SSD drive. I used FilePro Explorer app on my iPhone to set up tasks to do backups of my content from the SD cards to SSD drive. The one hiccup I encountered is FilePro Explorer (or this hub, not sure which) wouldn't recognize my GoPro cameras as a data source, so I had to remove the SD card from my GoPro Cameras, insert the card into another USB hub that had an SD card adapter (like the one here https://amzn.to/4dlkhMt ) and plug that into the Satechi Hub as another drive source, which it then recognized my SD card from the GoPro camera. So basically two small USB hubs and an App on my iPhone replaced what I would normally do with my laptop. Big weight savings when you're on a bike or motorcycle traveling.
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Reviewed in the United States on May 20, 2026
L
Verified Purchase
Levi
Belleville, US
★★★★★ 1
Flaky and Fickle
Style: Data Transfer (10Gbps)
Worked great for a month. Went to plug in a spare ssd to back up files from tablet and it never has worked since. No data or power through any ports. The light turns on and stays solid but is just dead. Waste of my money for now it is outside of return and I am having troubles getting in touch with Satechi.
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Reviewed in the United States on December 21, 2025

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