This is a A-50H 50H Steel Detachable Chain (10 ft) PN: 50HMain Description As Following : A-50H 50H Steel Detachable Chain (10 ft) P.N: 50H Dim A (1): 1-9/32Dim B (2): 25/32Dim C (3): 1-3/8 Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Steel Detachable Chains, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 1-9/32 Dim B (2): 25/32 Dim C (3): 1-3/8