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Availability:
In Stock.
Arrives
Sunday, Aug 30
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Style: DIY Kit
Features
- [REWARDING DIY BUILD EXPERIENCE] Assemble your own high-performance 3D printer with a detailed step-by-step guide designed to teach the mechanics and electronics of professional 3D printing.
- [HIGH-SPEED FDM PERFORMANCE] Delivers fast, precise printing with excellent surface quality, optimized for both prototyping and production use. Print Size 9.84 x 8.3 x 8.6 in.
- [INPUT SHAPING FOR CLEAN OUTPUT] Advanced motion control reduces ringing and vibration, ensuring sharp edges and consistent print quality at higher speeds.
- [PROFESSIONAL-GRADE RELIABILITY] Engineered for stable, repeatable performance in workshops, studios, and production environments.
- [OPEN-SOURCE & FUTURE-READY DESIGN] Fully upgradeable platform with long-term firmware support and modular hardware design from Prusa Research.
- [DIY KIT WITH PRUSA SUPPORT] This self-assembly kit includes a sample of Prusament PLA filament and is backed by lifetime technical assistance and professional customer support.
Description
The Original Prusa MK4S is a proven, high-performance 3D printing platform designed for reliability, precision, and everyday productivity. Built on years of refinement, the MK4S delivers consistent, high-quality prints with fast setup, intuitive operation, and dependable long-term performance. It is engineered for users who value stability, print quality, and a mature, well- supported ecosystem over experimental features. Designed and manufactured in the European Union, the MK4S benefits from Prusa’s open ecosystem, continuous firmware development, and extensive material support. Whether used in a home workshop, educational environment, or professional production setting, the MK4S is built to deliver reliable results day after day. JOSEF PRUSA (R), PRUSA RESEARCH (R), PRUSA POLYMERS (R), PRUSA ORANGE (R), PRUSA (R), PRUSA 3D (R), and PRUSAMENT (R) are registered trademarks of Prusa Development a.s., used by Prusa Research a.s. under license.
Brand: ORIGINAL PRUSA
Material: Metal, Plastic
Color: Black Orange
Product Dimensions: 19.6"D x 15.7"W x 21.6"H
Item Weight: 7 kg
Product Dimensions: 19.6 x 15.7 x 21.6 inches
Item Weight: 15.4 pounds
Item model number: MK4S-KIT-PEI
Date First Available: January 26, 2025
Manufacturer: Original PRUSA
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Aug 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: DIY Kit
I bought this after seeing it on Amazon Prime Day, 720 after fees which i feel is a great price for this printer! I received the printer kit on July 13th at night so I didn't start assembly until the following day, the instructions are very well written and it took me about 2 days of working on it(maybe like 14 hours or so)since I was also watching Netflix. I didn't have any issues at all during assembly, it was actually pretty fun looking back at it now and I would totally do it again. The guide includes comments from other users as well and they may be helpful to you on that particular step. Just take your time and read the directions clearly and you shouldn't have any issues. After getting it assembled I printed the prusa keychain and it came out great! As of 7/22 I already have 3 days 14 hours on the printer so I am loving it! My dishwasher was missing a clip for the top dish rack and I already printed a replacement for it. Overall I am really satisfied with the printer and have already ordered the MMU3 for multicolor prints.
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Reviewed in the United States on July 23, 2025 by Ed
Style: DIY Kit
Great to build and use for kids, can be assembled in a day with a lot of fun. Works fine right after assembling. Different brands of PETG and PLA filament from Prusa, Bambu Lab, and Esun print well even with generic profiles, while extrusion multiplier and bed temperature tuning according to ambient humidity and temperature are beneficial for accuracy to print miniatures. Very durable build and can be moved by the top of the frame. Surprisingly quiet even for a live room. Part cooling is fantastic while still very silent. Prusa Slicer integration (i.e. Prusa Connect) and iOS/Android mobile app with cloud slicer (i.e. EasyPrint) just work too. And it actually costs about the same as a cheap Chinese 3D printer like the Ender 2 v2 with a replaced extruder, powerful full-metal hotend, linear rails, quality Z axes, a custom cooling system, RPI Zero W2 with Klipper, etc.
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Reviewed in the United States on July 29, 2025 by Alexey
Style: DIY Kit
This is simply the best open designn 3D printer available. When purchased as a kit it gives you the opportunity to understand how the system is designed and how to best tune and adjust it over time. There are lower cost 3D printers, but their accuracy and consistency will not match this printer. If you do not take your time and you rush through the assembly of the kit, you would probably be better off buying the fully assembled printer. The more careful and meticulous you are in the assembly, the better the performance of the finished printer will be. There is a wonderful set of videos available online in addition to the printed instructions. I would strongly recommend using the videos to complement the printed instructions. The printer is packaged securely in it's shipping box and has everything that you will need in the box, including Prusa's inclusion of a bag of gummy bears, to serve as your reward for completing the assembly. If build quality and accuracy of printing matter to you, this is the 3D printer to choose.
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Reviewed in the United States on September 17, 2025 by Mitch Buchman
Style: DIY Kit
Building this kit is worth the time and effort. The interactive instructions on the website along with comments from other people are extremely useful. It took me 3 days to assemble it, and I didn’t break any of the delicate printed plastic parts, and I only had to sacrifice one thermal pad, and I stripped out just one screw and nut in the beginning. The kit includes many spare parts for small snafus such as these. The design uses many 3D printed parts held together with allen key screws and nuts. A bit tedious to work with but not difficult once you get the hang of it. The interactive instructions are not perfect, but that’s where the comments fill in what details may be missing. Some people report having issues with the automatic calibrations at the end, and talk about that in the comments. As I worked through my assembly, I followed the instructions, and only kept the comments in mind for later if I had calibration issues. My calibrations all passed the first time just from following the instructions, and then I started printing models I already had ready to go. I used the recommended Prusa slicer software and the default settings deliver some impressive results. I would say that the inexpensive Elegoo PLA filament that I bought with it works great!
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Reviewed in the United States on April 13, 2026 by Alex G
Style: DIY Kit
Why did you pick this product vs others?: I wanted a second Prusa I already own an MK3S and I love it! So why not an MK4S. Unfortunately the kit was missing the trapazoid nuts. They where not in the motor box 🙄. Anyways I reached to Amazon they suggested I ship the whole thing back and exchange it. I think thats a waste of time for Me, Amazon employees, and Prusa. I just ordered the Nuts. I will say after building this Printer WoW! night and day difference from MK3s. I will say that because this printer is Open source finding parts, it is very easy, and that's why I stick with prusa. And of course the quality 👌 😉 I give the printer it self a 5/5 I give Prusa QC 3/5 for there mistake of not including trapazoid nut. For a total score of 4/5 Update 7/21/2025 LCD died after 3 days 😪 I will contact Prusa directly Guess I will get to review support now. So product review is now 1 star.
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Reviewed in the United States on July 16, 2025 by PabloG.
Style: DIY Kit
I was super excited to finally get this. Spent who knows how many hours assembling this thing just for it to have this heater assembly error. Couldn't find anything wrong with wiring. Found a loose fuse on the mainboard. Romario from Prusa customer service helped me get a new board shipped so we will see if I finally get it to work. I will update with quality at that point.
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Reviewed in the United States on August 16, 2025 by Tim W
Style: DIY Kit
Excellent Product.
Reviewed in the United States on June 8, 2026 by W. Coyote, Super Genius
Style: DIY Kit
Works great and buying this printer as a kit did save some money but note that I found it a challenging assembly. I have built quite a few computers but this was more difficult. At the end I wondered whether the saving was worth the frustration. Getting the tension right on drive belts takes much more fussing around than just screwing in a board or a drive. In several places some assembly required awkward reaching around the printer. The step by step directions were good and the comments inserted into the guide by other users were sometimes essential - when the wording in the online guide was not as clear as it could be. Clever idea to include such comments. I added my own when I thought I could contribute. I also used their online 24/7 chat to get help a couple of times when I could not figure out why I could not get the printer to pass a calibration test. It turned out that i had not noticed that one of bearings had slipped out of position. Only thing negative I can think of is that the power cord did not fit very well and could become loose - which would turn the printer off! Fortunately, I had a compatible cord from an old computer and it fits perfectly. I guess I could have tried filing their plug down so it would fit better but easier to just swap cables. I have now printed a number of things starting with the easy to use PLA filament. My first try with the TPU (FLEX) filament was not so good but they do warn you of possible difficulties with that kind of filament.
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Reviewed in the United States on July 18, 2025 by PJ-Jim