1.SHR Pro longboard wheels 2.Material: PU casting 3.Hardness: 75A~85A 4.Rebound: 60% ~ 80% 5.Size & color can be cust Materials: DuPont MDI high polyurethane(SHR) and PU castingHardness: 75 to 85ARebound: 60, 70 and 80%OEM orders are welcomeSizes: 55 x 32, 55 x 34, 56 x 24, 58 x 32, 58 x 36, 58 x 38, 59 x 43, 60 x 32, 60 x 36, 60 x 40, 60 x 44, 60 x 48, 61 x 42, 61 x 45, 62 x 38, 62 x 44, 62 x 50 ...