- Applicable model and compatibility: This nozzle hot end kit features an improved thread nozzle structure with removable and replaceable nozzles. Compatible with Bambu lab A1 or A1 mini 3D printers. It is an assembled 3D printer extruder with an all-metal hotend kit designed for high temperature printing. - Easy to replace: An enhanced version compared to the original. The original A1 hot end extrusion head had no interchangeable nozzles. The Xirbbo A1 extrusion head uses hardened steel threaded nozzles that can be removed and replaced to reduce operating costs, and this A1 hot end can be swapped with special interchangeable nozzles. - Excellent materials: The heating block is made of nickel-plated brass and Ti alloy, offering good heat resistance, abrasion resistance, erosion resistance, and a long service life. The metal hotend and nozzles provide durable, reliable performance. - High temperature performance: The tempered steel nozzle is built from hardened steel with high thermal conductivity, strong mechanical strength, and oxidation resistance for long life. It supports high temperature filaments up to 320 C. The removable nozzle design enables quick replacement and time savings. - Practical use scenarios: - Upgrade a Bambu lab A1 or A1 mini to enable interchangeable nozzles for different print tasks. - Switch nozzle sizes quickly to balance detail and print speed without replacing the entire unit. - Use in demanding high temperature prints that require stable operation and extended nozzle life.