Please confirm your 3d printer model before ordering. Therefore, this assembled printhead hotend is very easy to install on Kobra S1/Kobra S1 Combo 3D printers. Aazon.co: HysiPrui 2 Packs 3D Printer Kobra S1 Assebled Extruder... 【Compatible 3D Printers】: This extruder hotend replacement is only compatible with Anycubic Kobra S1/Kobra S1 Combo FDM 3d printers, not for other 3d printer models. 【High Quality 3D Printer Accessories】: Includes assembled kobra s1 hotend kit parts: high precision nozzle, throat tube, heater block thermistor and heater cartridge for smoother printing and better 3D printed models. For Anycubic Kobra 3 Hotend Kit New Upgrade 0.4mm 0.6mm 0.8mm Brass hardened steel nozzles for Kobra 3 Combo 3D Printer Anycubic S1 Combo 3D Printer Upgraded Ceramic Kobra S1 Hotend Assembled Kobra S1 Nozzle And produced by a rigorous design and testing team, no leakage and clogging, you can easily start your 3D printing experience. The unique design of the scratch-resistant 2-piece vented windshield offers function in all seasons. During colder months, the full windshield offers the needed front wind protection 【Easy Installation】: Compact form factor, the heater block, heatbreak and hardened steel 0.4mm nozzle come with modular design, eliminating the need for wiring and stripping work.