EDCWDTYYECProduct name: 90 Degree Right Angle Transmission Reversing GearboxFrame material: aluminum alloyFrame size: 50x50x25MMGear teeth number: 20Gear inner hole size: 6MM/8MMGear outer diameter: 21MMStep outer diameter: 16MMTooth length: 7MMTotal length of gear: 13.2MMFixing screw hole: M4*2Material: S45C carbon steelInstallation center distance: 18MMWeight: Type A , Type B Note:The alloy processing, drilling and cutting process may produce scratches, which will not affect the use.The product has no fixed mounting holes, and the buyer needs to punch and fix it by himself, and there is no cover on the top and bottom.This product is a simple model and cannot be used for high-speed operation. It is used in places that do not require high accuracy. Please do not purchase those with high accuracy requirements.