1、APPLICABLE MODEL: 3D printer extruder hot end kit, suitable for Ender 3, for Ender3 V2, for CR10 and other models, which has good compatibility. 2、GOOD COOLING: With cooling system and anodized aluminum shell, the hot end can generate less heat, dissipate heat quickly and be used safely. 3、SAFE OPERATION: With fine workshop, greatly reduce the risk of congestion and uneven extrusion, provide with consistent output, and reduce loss. 4、APPLICABLE FILAMENT: The 3D printer hotend kit is applicable to ABS, nylon, polycarbonate and other filaments, with a wide range of applications. 5、EASY INSTALLATION: The hot end has been pre assembled for easy installation, and the installation position is reserved for the heating element. 1 x Extruder Kit Item Type: 3D Printer Extruder Material: Aluminum Alloy, Brass, Stainless SteelInstallation method: Thread ConnectionScope of Application: 3D PrinterNozzle Size: 0.4mmThroat Length: Approx. 30mm / 1.2inAluminum Block Size: Approx. 20 x 20 x 10mm / 0.8 x 0.8 x 0.4inApplicable Models: For Ender 3, for Ender3 V2, for CR10, etc.