1、SMOOTH APPEARANCE: This 3D printed red metal extruder is made of premium metal with a sandblasted oxidation finish for a smooth and beautiful appearance 2、COMPLETE ACCESSORIES: Kit includes all necessary screws and parts to replace your weak plastic extruder directly, screw on the new metal extruder and you're ready to print 3、NO FRACTURE: This extruder realizes true seamless connection, remove the pneumatic joint on the basis of the old version, to prevent the pneumatic joint box PTFE pipe connection rupture 4、APPLICABLE MODEL: Double gear extruder is suitable for Ender 3, for CR 8, for CR 10 series, widely compatible 5、CORROSION RESISTANT ALUMINUM ALLOY: 3D printer extruder is made of excellent aluminum alloy material, light weight, possess good strength and good corrosion resistance