This is a A-55A1L 55A1L Attachment Link PN: 55A1LMain Description As Following : A-55A1L 55A1L Attachment Link P.N: 55A1L A-55A1L 55A1L Attachment Link P.N: 55A1L Crossed From: 2221-24921 JOHN DAY Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Steel Detachable Chains, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada