... 3. roller: 10# steel 4. pins:30CrMnTi CT100 motorbike chain 1.Material:#45MN2.Has taken measures to better antirust3.Long ... 420H,428H,520H,525H,530HHD Non-O-Ring Chain Model:428HD,520HD,525HD,530HD,630HDO-Ring Chain Model:520-O,525-O,530- ... -O,428H-O,520H-O,525H-O,530H-OX-Ring Chain Model:428H-X,520H-X,525H-X,530H-XSuper ... O-Ring Chain Model:520-SO,525-SO,530-SO,420H-SO, ...