# Prusa i3 MK2.5S: specs, SimplyPrint compatibility and setup > **Expected to work** (Most likely). Not confirmed yet, but we expect it to work like the Prusa i3 MK2.5. - By Prusa, Czechia - Launched February 12, 2019 - Canonical page: https://simplyprint.io/compatibility/prusa-i3-mk2-5s ## Prusa i3 MK2.5S at a glance The Prusa i3 MK2.5S is a 3D printer by Prusa with a 250 x 210 x 210 mm build volume. - Build volume: 250 x 210 x 210 mm - Multi-material units it works with: Prusa MMU 2 - Enclosure: Open frame - Motion system: Bed slinger - Prints well: PLA, PETG, TPU & flexibles ## Connect the Prusa i3 MK2.5S to SimplyPrint | Way of connecting | Status | What you need | Notes | | :--- | :--- | :--- | :--- | | OctoPrint (Directly, over USB) | Expected to work | A Raspberry Pi running OctoPrint, plugged into the printer with a USB cable | Prusa's 8-bit firmware on a miniRAMBo with a USB port, like the MK2.5, which prints over USB from OctoPrint. ([Source](https://github.com/prusa3d/Prusa-Firmware/blob/MK3/Firmware/variants/MK25S-RAMBo13a.h)); Expected to work like the Prusa i3 MK2.5 | | SimplyPrint Client | Not confirmed yet - help us find out | | No built-in PrusaLink; Prusa's older Raspberry Pi edition of PrusaLink supported the MK2.5S, but whether the SimplyPrint Client works with it isn't known. | | Klipper (Moonraker) | Not compatible | | Ships Prusa's Marlin-based firmware. Klipper only if you install it yourself. ([Source](https://github.com/prusa3d/Prusa-Firmware/blob/MK3/Firmware/variants/MK25S-RAMBo13a.h)); Doesn't ship with Klipper: it runs Klipper after you install it in place of its own firmware, a modification | | Prusa direct firmware | Not compatible | | SimplyPrint's Prusa firmware runs only on Prusa's 32-bit Buddy printers (MINI, MK3.5, MK3.9, MK4, XL, CORE One); the MK2.5S has an 8-bit miniRAMBo. ([Source](https://simplyprint.io/setup-guide/methods/prusa-direct)) | - [How to set up OctoPrint on Prusa i3 MK2.5S](https://simplyprint.io/compatibility/prusa-i3-mk2-5s/octoprint-setup) - [Help us confirm](https://simplyprint.io/compatibility/prusa-i3-mk2-5s/confirm) ### What works with SimplyPrint Connected through OctoPrint, SimplyPrint is expected to support everything the Prusa i3 MK2.5S lets other software do: the camera and AI failure detection, remote printing, temperature and movement control and AutoPrint. 3 features depend on how it's set up: the table says what each needs. ## What slicer to use for the Prusa i3 MK2.5S Prusa printers use PrusaSlicer, Prusa's own slicer. There's no ready-made profile for the Prusa i3 MK2.5S in our cloud yet. - [PrusaSlicer](https://simplyprint.io/features/slicer/prusaslicer): No ready-made profile for the Prusa i3 MK2.5S yet · Prusa's own slicer · Runs in the SimplyPrint cloud - [OrcaSlicer](https://simplyprint.io/features/slicer/orcaslicer): No profile for the Prusa i3 MK2.5S · Runs in the SimplyPrint cloud - [BambuStudio](https://simplyprint.io/features/slicer/bambustudio): No profile for the Prusa i3 MK2.5S · Runs in the SimplyPrint cloud - [ElegooSlicer](https://simplyprint.io/features/slicer/elegooslicer): No profile for the Prusa i3 MK2.5S · Runs in the SimplyPrint cloud - [CrealityPrint](https://simplyprint.io/features/slicer/crealityprint): No profile for the Prusa i3 MK2.5S · Runs in the SimplyPrint cloud - [Cura](https://simplyprint.io/features/slicer/cura): No profile for the Prusa i3 MK2.5S · Runs in the SimplyPrint cloud - [Kiri:Moto](https://simplyprint.io/features/slicer/kirimoto): No profile for the Prusa i3 MK2.5S · Runs in the SimplyPrint cloud We only list slicers you can use in the SimplyPrint cloud, so there may be others for the Prusa i3 MK2.5S. ## The app for the Prusa i3 MK2.5S Use SimplyPrint as the app for your Prusa i3 MK2.5S: watch and run it from your phone or any browser, slice in the cloud, and keep it next to your other printers. It's free to start. Prusa's own app is [Prusa Connect](https://help.prusa3d.com/article/prusa-connect-and-prusalink-explained_302608). - Printers from other brands: SimplyPrint yes; Prusa Connect: Only Prusa Research printers - Works without Prusa Research's cloud: SimplyPrint yes; Prusa Connect: Only through Prusa Research's cloud - An app for iPhone and Android, the same in any browser, and a slicer in the cloud. - More than monitoring: a print queue, AI failure detection, AutoPrint and accounts for a team. - Hosted in Frankfurt, Germany, under the GDPR. [Connect the Prusa i3 MK2.5S to SimplyPrint, free](https://simplyprint.io/setup-guide/prusa/i3-mk2-5s) · [App Store](https://apps.apple.com/app/simplyprint-3d/id1519749400) · [Google Play](https://play.google.com/store/apps/details?id=com.simplyprint.appdev) [SimplyPrint's print farm software for Prusa](https://simplyprint.io/print-farms/prusa) ## Automate the Prusa i3 MK2.5S **Bed slingers are the easiest to automate.** The Prusa i3 MK2.5S moves its bed back and forth, so its plate comes out to the front of the printer. That's what plate swappers like these use: they take the finished plate off and slide a fresh one on. Without a kit, a G-code routine can push cooled prints off with the toolhead. For example: [JobOx](https://simplyprint.io/features/autoprint/jobox), [swapmod](https://simplyprint.io/features/autoprint/swapmod). ### Ways to automate it - [Push prints off with the toolhead](https://simplyprint.io/features/autoprint/push-off): On a bed slinger, a G-code routine can sweep the cooled print off the bed before the next job starts. - [Your own ejection G-code](https://simplyprint.io/features/autoprint/custom): Write the routine that clears your plate, and AutoPrint runs it after every print. - [A robot arm, or anything with an API](https://simplyprint.io/features/autoprint/api): Tell SimplyPrint the plate is clear through the API or a webhook, from a robot arm or your own system. - [Clear it by hand, keep the queue](https://simplyprint.io/features/autoprint/manual-mode): AutoPrint waits for you to mark the plate clear, then starts the next job. [How AutoPrint works](https://simplyprint.io/features/autoprint). AutoPrint comes with the Pro plan and up. ## Prusa i3 MK2.5S specifications: bed size, print height and more ### Size - Build volume: 250 x 210 x 210 mm - Bed type: Rectangle - Bed size: 250 x 210 mm - Max print height: 210 mm ### Printing - Enclosure: Open frame - Motion system: Bed slinger - Max extruder temperature: 300 °C - Has heated bed: Yes - Max bed temperature: 100 °C - Number of nozzles: 1 - Toolheads: 1 - Direct drive: Yes - Probing tool / Auto Bed Leveling: Yes - Filament width: 1.75 mm ### Multi-material - Multi-material units it works with: Prusa MMU 2 - Toolchanger or hotend changer: No - IDEX (independent dual extruders): No ### Connecting - Supports serial printing: Yes - Shipped firmware: Marlin ### Files and slicing - Supported file formats: G-code (.gcode, .gco, .g) ### The printer - Printer manufacturer / brand: Prusa - Printer model name: i3 MK2.5S - Made by a company from: Czechia - Launched: February 12, 2019 ## What filament can the Prusa i3 MK2.5S print? Filament compatibility for the Prusa i3 MK2.5S: the materials it can handle, judged from its hotend, bed, chamber and enclosure. | Filament | Suitability | Notes | | :--- | :--- | :--- | | PLA | Great | The easiest filament to print. Works on almost any printer; a heated bed helps adhesion but is not required. | | PETG | Great | Comfortably in range (PETG likes a ~230-250C hotend and a ~70-85C bed). | | TPU & flexibles | Great | The direct-drive extruder feeds flexible filament well. Print slowly for clean results. | | ABS & ASA | With care | The bed is hot enough, but ABS and ASA warp without an enclosure, which is strongly recommended for clean prints. | | Nylon (PA) | With care | Possible with care - an enclosure and very dry filament are essential. | | Polycarbonate (PC) | With care | On the edge - PC really wants an enclosed, hot chamber to avoid warping. | | Carbon-fiber & glass-filled | With care | Possible if you fit a hardened or wear-resistant nozzle - the abrasive fibers quickly wear a stock brass nozzle. | ### Best filament for the Prusa i3 MK2.5S Filaments the Prusa i3 MK2.5S prints well, Prusa's own first, then the best known. - [Prusament PETG V0](https://simplyprint.io/filaments/prusament/petg-v0): PETG, 2-2 °C - [Prusament PLA](https://simplyprint.io/filaments/prusament/pla): PLA, 205-225 °C - [Prusament TPU 95A](https://simplyprint.io/filaments/prusament/tpu-95a): TPU, 220-240 °C - [Prusament Blend Silk PLA](https://simplyprint.io/filaments/prusament/blend-silk-pla): PLA, 205-225 °C - [Bambu Lab PLA Basic](https://simplyprint.io/filaments/bambu-lab/pla-basic): PLA, 190-230 °C - [Bambu Lab PLA Matte](https://simplyprint.io/filaments/bambu-lab/pla-matte): PLA, 190-230 °C - [SUNLU PLA](https://simplyprint.io/filaments/sunlu/pla): PLA, 190-230 °C - [Anycubic PETG](https://simplyprint.io/filaments/anycubic/petg): PETG, 230-250 °C ## Compare the Prusa i3 MK2.5S with similar printers - [Prusa MK4](https://simplyprint.io/compatibility/prusa-mk4): Compatible, 250 x 210 x 220 mm, Also by Prusa · Similar build volume · Multi-material too - [Prusa MK4S](https://simplyprint.io/compatibility/prusa-mk4s): Compatible, 250 x 210 x 220 mm, Also by Prusa · Similar build volume · Multi-material too - [Bambu Lab A1](https://simplyprint.io/compatibility/bambu-lab-a1): Verified by SimplyPrint, 256 x 256 x 256 mm, Similar build volume · Multi-material too - [Flashforge AD5X](https://simplyprint.io/compatibility/flashforge-ad5x): Compatible, 220 x 220 x 220 mm, Similar build volume · Multi-material too - [Compare the Prusa i3 MK2.5S with other printers](https://simplyprint.io/compatibility/compare?compare=prusa-i3-mk2-5s#choose) ## About Prusa Prusa Research is a Prague company founded in 2012 by Josef Průša, who came from the open-source RepRap project. It designs and builds the Original Prusa and Prusa CORE printers, makes Prusament filament, develops the PrusaSlicer slicer and runs the Printables model site. Printers are built in Prague and at its US site in Delaware, sold assembled or as kits, and used by hobbyists, schools, businesses and print farms. - Founded: 2012 - Headquarters: Prague, Czech Republic - Ownership: Prusa Research a.s., founded and led by Josef Průša - People: More than 1,200 people (company site, 2026) - Website: https://www.prusa3d.com Openness: Open (4.9 of 5) Prusa is the most open of the large brands: GPL firmware, an open slicer, full local control without an account and spare parts for everything. Hardware design files now come under Prusa's own Open Community License, which allows personal and in-house business use but not selling machines. - Firmware and custom firmware (5 of 5): Firmware for current printers is published on GitHub under GPL-3.0 and updated with every release. Official firmware is signed, but Prusa documents how to flash custom firmware by breaking a seal on the board and says this does not void the warranty. Prusa says firmware and printable parts are shared right away and electronics schematics later. - Local control and integrations (5 of 5): PrusaLink, built into the CORE One, MK4S, MK3.9, MK3.5 and XL, handles monitoring, file uploads and print control on the local network without internet or an account, and printing from USB works offline. Prusa publishes PrusaLink's HTTP API as an OpenAPI specification on GitHub, and its help centre covers OctoPrint setup. Prusa Connect is an optional cloud service for remote access. - Third-party filament, slicers and parts (5 of 5): Printers are open to any filament; PrusaSlicer is GPL-licensed and other slicers work. Instead of a locked RFID system, Prusa created OpenPrintTag, an NFC spool-tag standard that is free for any brand to use and works offline. - Repairs and spare parts (5 of 5): The e-shop sells spare parts for each printer, printable parts are published, and the full CORE One CAD files are released. Prusa's open-source page says its goal is printers that stay moddable and easy to repair for decades, and its licence explicitly allows making spare parts for your own machines. - Data and privacy (4 of 5): No account is needed for local use through PrusaLink or USB. Prusa Connect needs a Prusa account and stores G-codes and telemetry in the cloud. Prusa Research is an EU company and publishes its privacy policy and a Trust Center. - Community and documentation (5 of 5): Large community around Printables and the forum, a detailed knowledge base, and firmware and slicer developed in public on GitHub with open issue trackers. ### Pros - GPL firmware with a documented, warranty-safe way to flash custom firmware. - Full control on the local network through PrusaLink, with no account needed. - Spare parts for every printer, published printable parts and released CAD files. - Kits available for people who want to build and understand their printer. - Made in Prague, with a second factory in Delaware for US buyers. - OpenPrintTag is an open spool-tag standard any brand can use. ### Cons - Hardware files use Prusa's own OCL licence, which bars selling machines built from them; it is not an OSI open-source licence. - Electronics schematics are published later than firmware and printable parts. - Remote access and cloud storage need Prusa Connect and an account. ### Track record - July 2026: Printed Solid, the Delaware company Prusa Research bought in 2022, was renamed Prusa USA. Its Wilmington site builds the MK4S and CORE One+, makes filament and is Prusa's US service centre. - December 2025: Prusa released the full CAD files of the CORE One under its new Open Community License (OCL). OCL allows modifying, sharing mods and in-house commercial use, and grants patent and repair rights, but bars selling machines built from the files without an agreement, so it is not a standard open-source licence. Prusa said it is also filing patents on its designs. - October 2025: Prusa launched OpenPrintTag, a published NFC standard for smart filament spools that any brand can use without licence fees, starting with redesigned Prusament spools. - November 2024: Prusa announced the CORE One, its first fully enclosed CoreXY printer with active chamber temperature control. - March 2023: Josef Průša wrote that open source in 3D printing was under strain from cloners and licence violations. With the MK4, Prusa released firmware sources and models of the plastic parts but held back the electronics plans, planning to publish them later under a new licence. How Prusa compares with every other brand: https://simplyprint.io/articles/best-3d-printer Affiliate disclosure: Some links on this page are affiliate links. We may earn a commission if you make a purchase, at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases. ## Frequently asked questions ### Is the Prusa i3 MK2.5S compatible with SimplyPrint? Most likely. We expect the Prusa i3 MK2.5S to connect to SimplyPrint via OctoPrint, but nobody has confirmed it yet. If you have one, the setup guide shows within minutes whether it works, and your answer confirms it for everyone. ### How do I connect the Prusa i3 MK2.5S to SimplyPrint? Follow our step-by-step setup guide for the Prusa i3 MK2.5S. It shows how to connect it via OctoPrint, what you need for each, and which to pick. ### What slicer should I use for the Prusa i3 MK2.5S? Use PrusaSlicer, Prusa's own slicer, made for its printers. You can run it in SimplyPrint's online slicer; there's no ready-made profile for the Prusa i3 MK2.5S in it yet. ### Can I use OrcaSlicer with the Prusa i3 MK2.5S? Yes, but OrcaSlicer has no built-in profile for the Prusa i3 MK2.5S that we know of: start from a similar printer's profile and set the bed size, height and nozzle to match. ### What filament can the Prusa i3 MK2.5S print? Based on its specs (hotend up to 300C, heated bed up to 100C), the Prusa i3 MK2.5S handles PLA, PETG, or TPU & flexibles well. See the full filament guide above for ABS, nylon, PC and composites. ### Does the Prusa i3 MK2.5S work with OctoPrint or Klipper? The Prusa i3 MK2.5S works with OctoPrint, and SimplyPrint connects to it through them - so you get cloud access, a queue and camera monitoring on top. ### What is the Prusa i3 MK2.5S's bed size and build volume? The Prusa i3 MK2.5S has a 250 x 210 mm print bed and prints up to 210 mm tall, a build volume of about 250 x 210 x 210 mm. See the full specifications table above for bed type, temperatures and more. ### When did the Prusa i3 MK2.5S come out? Prusa launched the i3 MK2.5S on February 12, 2019. ### Can the Prusa i3 MK2.5S eject prints automatically? There's no kit for it that we support yet, but SimplyPrint's AutoPrint can push prints off with the toolhead, or run your own ejection G-code, and then start the next job from your queue. --- © 2026 SimplyPrint. All rights reserved. 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