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Original Prusa MK4S 3D Printer
Prusa · Released January 1, 2024

Original Prusa MK4S 3D Printer

Prusa's MK4S is a reliable open-frame printer with perfect first layers.

3D Printers
—/10What the pros sayPendingExpert consensus · Verified Oct 8, 2026See score breakdown ↓
Buying call

Buy the MK4S if you want a dependable, open, upgradable printer: early reviews praised its high-flow nozzle, perfect first layers, PEI steel sheet, quiet running and reliability. Skip it if price matters, because it's expensive for an open-frame printer. Print quality drops at its fastest speeds, and it has no enclosure.

Full verdict ↓
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Editor testedHands-on testing and real-world use
Real-world useBased on everyday testing, not a spec sheet
Unbiased reviewIndependent and objective, sources shown
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Key specs
Build volume
250 x 210 x 220 mm
Max nozzle temperature
290
Max print speed
200
Supported materials
PLA, PETG, ABS, ASA, Flex, PC, PA
Highlights

Specs that matter

Body
Weight
15.43 lb (7 kg)
Dimensions
500 x 550 x 400 mm
At a glance

Product highlights

Verified attributes, grouped for quick scanning.

Weight15.43 lb (7 kg)500 x 550 x 400 mm
30 attributes · See all specifications
Price & availability

Where to buy

Prices from trusted US retailers, updated daily.

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Buying decision

Should you buy it?

Buy the MK4S if you want a dependable, open, upgradable printer: early reviews praised its high-flow nozzle, perfect first layers, PEI steel sheet, quiet running and reliability. Skip it if price matters, because it's expensive for an open-frame printer. Print quality drops at its fastest speeds, and it has no enclosure.

Best for

Makers who value reliability and open hardware.

Not for

Budget buyers and high-temperature printing.

Main strengthPerfect first layers
Main weaknessExpensive
Reasons to buy
Perfect first layers
High-flow nozzle
Very quiet
Reliable
Reasons to avoid
Expensive
Quality drops at top speed
No enclosure
Measured view—/10What the pros say · verified oct 8, 2026.
ScoreVerified Oct 8, 2026
Product data

Full specifications

30 attributes, grouped for quick scanning. Verified Oct 8, 2026. Spot a wrong value? Hit the next to it.

Build

Technology
FDM/FFF
Build volume
250 x 210 x 220 mm
Build width (X)
9.84 in (25 cm)
Build depth (Y)
8.27 in (21 cm)
Build height (Z)
8.66 in (22 cm)

Extruder & Hotend

Max nozzle temperature
290
Nozzle diameter
0.02 in (0.4 mm)
Extruder type
Direct Drive Nextruder

Speed & Quality

Max print speed
200

Heated Bed

Max bed temperature
120
Auto bed leveling
Yes

Enclosure

Enclosed
No

Motion

Motion system
Cartesian Bedslinger

Materials

Supported materials
PLA, PETG, ABS, ASA, Flex, PC, PA
Filament diameter
0.07 in (1.8 mm)
Multi-colour / multi-material
Optional MMU
Filament runout sensor
✓

Safety & Convenience

Power loss recovery
✓

Connectivity

Ethernet
Yes
USB
Yes

Software

Slicer support
PrusaSlicer, Cura, OrcaSlicer
Firmware
Prusa Firmware

Launch

Release date
2024
Vote & discuss

Community says

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