Compatible 3D Printers: This extruder hotend replacement is only compatible with Anycubic Kobra S1 Combo 3D printers, not for other 3D printer models. Please confirm your 3D printer model before ordering. Easy Installation: Compact form factor; the heater block, heatbreak, and 0.4mm nozzle feature a modular design, eliminating the need for wiring and stripping work. This assembled printhead hotend is easy to install on Kobra S1 Combo 3D printers. High Quality 3D Printer Accessories: Includes an assembled hotend kit with high precision nozzle, throat tube, heater block, thermistor, and heater cartridge for smoother printing and improved print quality. Support High Speed Printing: The semi-assembled hotend with an all-metal throat design ensures even heating and smooth filament flow, supporting high speed printing. Designed and tested rigorously to prevent leaks and clogs, enabling a reliable 3D printing experience. Warm Note: Check that all parts are securely tightened before use, as the assembled hotend kit may loosen during transportation. After installation, re-level the print bed. It is not recommended to replace the nozzle on this hotend. Due to different production batches, there may be slight variations in product appearance and labeling, which do not affect functionality. Specification: 2 Pieces Color: As shown Material: Hardened steel, silicone, plastic, metal Package Contents: 2 x Hardened Steel Nozzle Hotend Note: Light reflection and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm.