Siraya Tech Fibreheart ABS HT HF on the MK4S
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- Nozzle240–260 °C
- Bed100–110 °C
- Speed—
- Dry—
- Density1.05 g/cm³
Print at 240–260 °C nozzle, 100–110 °C bed.
MK4S maximums: nozzle 290 °C, bed 120 °C.
Sources & notes
Prusa MK4S with Siraya Tech Fibreheart ABS HT HF: Whether an enclosure is required is not in our current sources.
Dataset imported 13 October 2026. Manufacturer page 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 ABS HT HF nozzle temperature?
The listed nozzle maximum of 260 °C is within this printer's maximum of 290 °C.
Can the MK4S reach the listed bed temperature?
The listed bed maximum of 110 °C is within this printer's maximum of 120 °C.
Is an enclosure required?
Whether an enclosure is required is not in our current sources.
Is a hardened nozzle recorded?
A hardened nozzle is not recorded for this filament.