Material: MetalColor: Silver/BlackPackage: OPP BagS Ring Dia: 60 mm/2.3 inchS Ring Thickness: 13 mm/0.5 inchS Ball Dia: 25 mm/0.98 inchS Weight: 450 g/0.99 lb/15.8 ozM Ring Dia: 60 mm/2.3 inchM Ring Thickness: 25 mm/0.98 inchM Ball Dia: 25 mm/0.98 inchM Weight: 614 g/1.35 lb/21.6 oz