Notice: This hotend kit replacement is compatible with Prusa I3 MK4 FDM 3D printer. Package Included: 1 set hotend kit (heater cartridge, thermistor, heat block,throat tube, nozzle, silicone cover) 2PK brass nozzles The temperature resistance up to 500°C, with different thermal conductivity and smooth inner wall reduces clogging. Compatible Filaments The hotend works great with 1., 75mm filaments such as PLA/ABS/WOOD/PETG/TPU/Nylon etc. Upgraded Titanium Copper Split Heatbreak:Titanium TC4 reduces heat conduction upwards at the heating position and copper for heat dissipation to accelerate heat conduction. Prusa XL Hotend Kit Hotend For Prusa I3 Mk4/xl Print Heater Block 0.4mm Nozzle 24V 40W Hotend With Titanium Heatbreak How to replace a hotend heater (XL Single-Tool) | Prusa Knowledge Base If not, please tighten it firmly, otherwise it may lead to a leak. Nssnlur 24V 40W Hotend for Prusa I3 MK4 for Prusa XL, Hotend Kit Print Head Heating Block Hardened Steel Nozzle 0., 4 mm Extruder Hot End for Prusa MK4/XL Prusa Hotend Heatsink XL / MK4 Transport may lead to a delete.