Package Included: 1 set hotend kit (heater , thermistor, heat block,throat tube, nozzle, silicone cover) + 2PK brass nozzles. Tungsten Carbide Coated: It has a strong adsorption capacity, effectively preventing molten plastic from sticking to the nozzle. Premium Nozzle Quality: MK6 hardened nozzles are made of high-quality . The nozzle is not easy to stick filament with high hardness, to wear and tear. Simple Installation: Remove the old hot end and install the new hotend to start. (Heating tube, thermistor, nozzle etc are pre-installed) Filament material: The print for Prusa I3 MK4 works with 1.75 mm PLA/ABS/PETG/TPU/Wood filament. Notice:This hotend kit replacement is compatible with for Prusa I3 MK4 FDM 3D printer. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:aluminum Package Contents: 1 * hotend kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.