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 Metal. The nozzle is not easy to stick filament with high hardness, resistant 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) Notice: This hotend kit replacement is compatible with for 3/Combo/ Pro FDM 3D printer. Colour:As Shown Material:Metal Package Contents: 1x 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.