motorcycle chain 1)model numbers:420,428,428H,530,630 2)color available: blue black natural yellow 3)material: alloy steel Motorcycle chain's specification:1) Model:420 2) Standard: ISO, JCAS standard. 3) Material: 40Mn + Heat Treatment 4) Plate thickness: 1.65mm 5) Color: blue, black ,yellow and natural are available.Remark: If you want to know the technical details, pls check our website: www. ...