🌟 Nextruder Silicone Sock – Prusa (3-pack)
The Nextruder Silicone Sock is Prusa's official thermal protection accessory for the Nextruder's hotend block, compatible with MK4, MK4S, MK3.9, MK3.9S, XL, CORE One, CORE One+, and CORE One L printers. It encloses the hotend block, thermally insulating it from the external environment, reducing heat loss, improving temperature stability during printing, and preventing melted filament accumulation on the outside of the block. Sold in a 3-pack.
🔹 What makes the Prusa Nextruder Silicone Sock stand out?
- Thermal insulation of the hotend block — reduces heat loss to the environment, improving the hotend's stability and energy efficiency.
- Prevents filament accumulation on the block — the silicone surface prevents melted filament from adhering to the outside of the hotend block.
- More stable temperature maintenance — more consistent thermal conditions for precise extrusion, especially at high speeds.
- Official Prusa accessory — guaranteed quality and compatibility with the Nextruder across the entire compatible printer family.
- 3-pack — replacement stock for uninterrupted maintenance.
✅ Advantages
- Greater hotend temperature stability during printing.
- Prevents dirt and filament accumulation on the hotend block.
- Easy to install and replace when needed.
- 3-pack for extended maintenance.
⚙️ Compatibility
Compatible with:
- Prusa MK4 · MK4S · MK3.9 · MK3.9S · XL · CORE One · CORE One+ · CORE One L
Not compatible with:
- MK3.5 · MK3.5S · MK3S+ · MK3S · MK3 · MK2.5S · MK2.5 · MK2S · MK2 · MINI · MINI+ · MMU2S · MMU2 · MMU3 · SL1 · SL1S · CW1 · CW1S · HT90 · INDX
💡 Notes and Recommendations
- Ensure the nozzle and hotend block are clean before installing the sock.
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⚠️ Never install with the printer running or hot — risk of burns.
- Sold in a 3-pack.
- For correct installation, consult the repair manual at help.prusa3d.com and select the specific printer model.
Material tested and approved by Smart3DPT ✅
