This is a A-55A2R 55A2R Attachment Link PN: 55A2RMain Description As Following : A-55A2R 55A2R Attachment Link P.N: 55A2R A-55A2R 55A2R Attachment Link P.N: 55A2R Crossed From: 042-U5507 , , 042U5507 , , 2221-25221 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