Feature:1. APPLICABLE MODEL: This nozzle hot end kit adopt upgraded threaded nozzle structure, removable and separately replaced. Available for A1 or for A1 mini 3D printer2. EASY TO REPLACE: This is an upgraded version, upgraded from the original, the original for A1 hot end extrusion head does not have replaceable nozzles, the for xirbbo A1 extrusion head has threaded, hardened steel nozzles that can be removed and replaced to reduce running costs, for A1 hot end extrusion head special replaceable nozzles can be replaced3. EXCELLENT MATERIALS: Ni plated brass Ti alloy heating block has good heat proof, abrasion proof, erosion proof and long service life4. HIGH TEMPERATURE PRINTING: Hardened steel nozzle is made of excellent hardened steel material with higher thermal conductivity, higher strength, stronger oxidation proof and longer service life, which can support high temperature filament 320, and the removable nozzle is easy to replace and save time5. INSULATED SILICONE SOCKET: The silicone socket can prevent the fan from cooling the heat block and help stabilize the temperature, useful and practicalSpecification:Item Type: 3D Printer HotendFilament Diameter: Approx. 1.75mm / 0.07inInstallation Method: Threaded fixingCompatible Filaments: PLA, ABS, PETG, TPU, PP, PC, Nylon, etc.Compatible Models: For A1, for A1 miniInstallation Method: Magnetic installation.Package List:1 x Hotend2 x Wrench