... 06B,08B,10B,12B,16B,20B,24B,28B 3.OEM welcome 4.ISO9001:2008 Detailed Production ... roller chains &chain manufacturer B series1)material : 40mn2)pitch : 25.4mm3)plate thickness : 3.0mm4)color : nature,black ... the following1)roller chains: A series(12.7-63.5mm pitches),B series (9.525-50.8mm pitches ... :2040,2050,2060,20805)leaf chains:LH series,AL series6)stainless steel roller chains7)simplex,double ...