16B-2 duplex roller chains 1.Factory price 2.06B,08B,10B,12B,16B,20B,24B,28B ... OEM welcome 4.ISO9001:2008 Detailed Production Description(16B-2) durable duplex roller chains &chain manufacturer B series1)material : 40mn2 ... roller chain attachments:A-1,A-2.K-1,K-2,SA-1,SA-2,SK-A,SK-24)double ... upon receipt of your detailed requirements. (16B-2) durable duplex roller chains &chain manufacturer B series