Color: SilverCage Size: 3.5 * 2.9 cm/1.3 * 1.1 inchMaterial: Stainless SteelPackage: OPP BagThe diameter of the ball ring have 3 Size:40 mm/1.6 inch (S)45 mm/1.8 inch (M)50 mm/2.0 inch (L)