This is a A-55A2L 55A2L Attachment Link PN: 55A2LMain Description As Following : A-55A2L 55A2L Attachment Link P.N: 55A2L A-55A2L 55A2L Attachment Link P.N: 55A2L Crossed From: 042-U5508 , , 042U5508 , , 2221-25121 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