Compatible 3D Printers: This 2pcs extruder hotend replacement kits are only compatible with Anycubic Kobra S1/Kobra S1 Combo FDM 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, 0.4mm brass nozzle and 0.4mm Hardened Steel Nozzle, eliminating the need for wiring and stripping work. Therefore, this assembled printhead hotend is very easy to install on Kobra S1/Kobra S1 Combo 3D printers. High Quality 3D Printer Accessories: Includes 2 packs assembled hotend kits parts: high precision brass nozzle and Hardened Steel Nozzle, throat tube, heater block thermistor and heater cartridge for smoother printing and better 3D printed models. Support High-speed Printing:The high-flow system ensures the complete melting of filaments,supporting printing speeds up to 500mm/s while maintaining extrusion consistency Filament material: The print head for Anycubic Kobra S1 works with 1.75 mm PLA/ABS/PETG/TPU/Wood filament. Upgrade your 3D printing experience with this premium hotend combo pack designed specifically for Anycubic Kobra S1 and S1 Combo 3D printers. This set includes two complete all-metal extruder hot end assemblies featuring both a 0.4mm brass nozzle and a 0.4mm hardened steel nozzle. The all-metal construction ensures consistent heat distribution and reliable performance during your printing projects. The brass nozzle is perfect for standard filaments, while the hardened steel nozzle excels with abrasive materials. These replacement hotends maintain the precise specifications of your original equipment, ensuring seamless integration and optimal printing results. Whether you're looking to keep a spare on hand or replace a worn component, this comprehensive hotend set provides the versatility needed for various 3D printing applications.