16B-2 duplex roller chains 1.Factory price 2.06B,08B,10B,12B, ... roller chains &chain manufacturer B series1)material : 40mn2)pitch : 25.4mm3)plate thickness : 3.0mm4)color : nature,black,blue,yellow5)factory price ... OUR NEW OFFICE BUILDINGMain products as the following1)roller chains: A series(12.7-63.5mm ... chains:LH series,AL series6)stainless steel roller chains7)simplex,double,triplex chains If you ...