... 80 /DIN 16A-1 standard roller chain 1.material:40MN/A3 2.pitch:25.4mm 3.plate thickness:3.25mmANSI 80 ... are what we persue10.Packing:1pc packing in PP bag,white inner box, then pack in standard export carton or wooden case ... chains: SC3,SC4,SC5,SC6,SC8,SC105. PIV chains: A0,A1,A3,A4,A5,A66. O-ring chains and xw-chains: 420,428 ...