Outside limits
Siraya Tech Fibreheart PPA on the MK4S
MK4S cannot reach the listed nozzle temperature.
- Nozzle280–300 °C
- Bed70–80 °C
- SpeedNot listed
- Dry—
- Density1.21 g/cm³
MK4S maximums: nozzle 290 °C, bed 120 °C.
Sources & notes
Prusa MK4S with Siraya Tech Fibreheart PPA: The listed nozzle range reaches 300 °C, above this printer's maximum of 290 °C. The listed bed maximum of 80 °C is within this printer's maximum of 120 °C. Enclosure required is not listed for this filament. A hardened nozzle is not recorded for this filament.
Filament dataset verified date 13 October 2026. Printer source checked 14 October 2026.
Filament source · Printer source · Filament JSON
Prusa lists a 290 °C maximum nozzle temperature, a 120 °C maximum heatbed temperature, a Nextruder direct drive, and a brass CHT nozzle.
The comparison table on that page marks the enclosed chamber as not included, with an optional enclosure. MMU3 is optional.
Questions
Can the Prusa MK4S reach the listed Fibreheart PPA nozzle temperature?
The listed nozzle range reaches 300 °C, above this printer's maximum of 290 °C.
Can the MK4S reach the listed bed temperature?
The listed bed maximum of 80 °C is within this printer's maximum of 120 °C.
Is an enclosure required?
Enclosure required is not listed for this filament.
Is a hardened nozzle recorded?
A hardened nozzle is not recorded for this filament.