Features: Ensuring better concentricity of the gears and more even transmission of the filaments Hollowed stainless steel gears, reduction gear design, high ratio, high extrusion torques,more wear-resistant The gear adopts double balled bearings instead of the needle roller bearings, with smaller clearance and higher precisions. The feeding gear is from high-strength mold steel, and the surfaces treatments is coating. The overall hardness of the gear hardness value reaches 62-65; the surfaces hardness HV value reaches 1000-1200, which greatly ensures the gear's strength, wear resistance and corrosion resistance. Specifications: Name: For Spur coated spur gear (stainless steel large gear) gear set APPLICATION: For Spur Mini Extruder for VORON 0, 0.1 and 0.2 series or wherever you can use this gear set. Component: Stainless steel and -coated mold steel Size: about 25.8x27.5mm/1.02x1.08in Component：Metal Package Includes: 1Set Extruder Gear note: Due to the problem of lighting effects there is certain tolerances in product, please understand. Please allow 0-1cm error due to the measurement.