Product Name: 0.5M Plastic Gear 48/50/56 Teeth Orange Red Soft GearMaterial: PlasticColor: Orange RedModulus: 0.5 ModulusNumber of Teeth: 48/50/56 TeethSize: Bore: 2mm(fits tightly on 2mm shafts)Thickness: 1.5mmOuter Diameter: 25mm(48 Teeth), 26mm(50 Teeth), 29mm(56 Teeth)Pack Quantity: 20Pcs