Compatible Models: This heating block kit is compatible with for 2, 3D printers. EASY INSTALLATION: This hotend kit comes pre-assembled with heating tube, thermistor, nozzle and silicone sock, simply remove the previous print head, replace it with a one, then lock the retaining clip and wire the cables to complete the installation. Note: Before use, please check whether the heating tube and thermistor are tightened and whether the nozzle is fixed well to avoid printing problems. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:Copper plating Package Contents: 4 x heating block 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.