1 Ender 3 hotend, Plug and Play Ender 3 Pro Hotend, you do not need to cut it 2 Compatible with Ender 3, Ender 3 Pro and similar 3D printer but not for ender 3 Neo 3 There are 2 fans, fan covers, heat block, cooling block, nozzle, throat pipe, connector, teflon pipe, thermistor sensor, heating tube, screws, silicone cover, etc. 4 24V high speed fan, lose heat quickly and efficiently; nozzle and tube connect seamless, prevent material leaking and blocking 5. Silicone Cover is provided to help keep temperatures on the Ender 3 hotend much more stable and this will result in higher print quality and consistency