... .50mm4.color:natural.black.blue.yellow 5.has taken measures to better antirust6.long-life duration and high strength7.pre-stretched ... , 428H, 520, 520H, 530, 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series ... ,SC8,SC105. PIV chains: A0,A1,A3,A4,A5,A66. O-ring chains and xw-chains: 420,428,520,525,530,630 ...