[Compatible 3D Printers]: These 2-piece hotend extruder replacement kits are only compatible with Anycubic Kobra S1/Kobra S1 Combo FDM 3D printers, not with other 3D printer models. Please confirm your 3D printer model before ordering. [Easy Installation]: Compact size, the heating block, heat shield, and 0.4mm and 0.6mm hardened steel nozzles feature a modular design, eliminating the need for wiring and stripping. Therefore, this assembled print head is very easy to install on Kobra S1/Kobra S1 Combo 3D printers. [High-Quality 3D Printer Accessories]: Includes 2 packs of assembled hotend kits, a 0.2mm hardened steel nozzle, and a 0.8mm hardened steel nozzle: for smoother printing and better 3D printed models. [High-Speed Printing Support]: The semi-assembled print head with an all-metal throat design allows the print head to heat evenly and the filament to flow smoothly through the throat nozzle, supporting high-speed printing. Produced by a rigorous design and testing team, it is leak-proof and clog-free, allowing you to easily start your 3D printing experience. [Note]: We suggest checking that each part is securely tightened before use, as the print head assembly kit may loosen during shipping. After installing this print head kit, we recommend leveling the heated bed.