Feature: 1. APPLICABLE MODEL: Hot end assembly kit can directly replace the hot end of the original for Bb Lab X1, X1 Carbon, P1P models, and can be used with other DIY designs 2. HEAT RESISTANCE: The heating block has been upgraded to CuCrZr electroplating process, with high temperature resistance of 500 degrees Celsius printing and fast thermal conductivity 3. STABLE AND CONVENIENT: The anode black radiator and bimetallic insulated Ti alloy throat are fixed and locked with M3 top wire, which is easy to install, stable to connect, and can be disassembled and replaced, reducing the cost of use 4. ALL METAL SMOOTH INSULATION: Composed of bimetallic copper and Ti alloy insulation sections, provide better heat dissipation effect. The throat is closely integrated with the heating block, and the structure of the throat has been upgraded. A step limit has been added at the fitting point with the heating block, reducing the situation of material leakage and detachment 5. FAIL PROOF: The roughness of the inner wall of the throat and nozzle is Ra0.4, reducing blockage and improving printing quality. The connection between the heating block and the radiator is upgraded to two Ti alloy screws for fixation, avoiding the bending and breaking of the throat during high speed printing. At the same time, Ti alloy has better insulation effect and increase stability Specification: Item Type: 3D Printer Extruder Kit Material: CuCrZr, aluminum alloy, copper Ti alloy, silicone Extruder Nozzle Size: Approx. 1.75mm / 0.07in, 0.4mm / 0.02in Hardened Steel Nozzle Size: Approx. 1.75mm / 0.07in, 0.4mm / 0.02in Maximum Temperature: 500℃. Package List: 1 x Hot End1 x Hot End Clip1 x Accessory1 x Open End Wrench1 x Hex Wrench1 x Thermal Grease1 x Silicone Insulated Cover2 x Screw2 x Stopper