420 4sides rivet roller chain: 1)OEM offered 2)types:ISO/ ... part Chain NO. pitch plate thickness weight roller diameter material 420 12.700mm 1.45mm 6.8g 7.77mm 40mn 428 ... motorcycle chains ,satandard or OEM are accepted Bitmap 1)Type :420,420H,428,428H,530,630 and so on2)Rivet:support ... to contact us if you have any questions short pitch 420 4sides rivet roller chain