We supply many piston rings, bore size: 66.68, 85, 103.175, 82.9, 86, 87, 88.5, 89, 95.5, 97, 115, 128, 114.3, 120.65, 137.2, 139.7, 130 and so on. We have passed ISO9002, QS9000, ISO/TS16949, ISO14001 and ISO18001 quality system certificate and get certificates.