Roller Chain 1.Standards:ISO/DIN/ANSI 2.International Approvals:SGS/BV/ISO/DQS/API/AAA 3.Made Style:Manufacture and OEM ... Simple Roller Chains with A and B Series 1: Technical parameter 2.Roller chain parts 3.Product ... series chains, driving chains, conveyor chains, dragging chains, agricultural chains and so on;4. we have obtained ISO9001, ISO14001, ISO16969, AAA ...