This is a A-A620O A620-O Offset Link PN: A620OMain Description As Following : A-A620O A620-O Offset Link P.N: A620O A-A620O A620-O Offset Link P.N: A620O Crossed From: A620HL , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Roller Chains and Attachment Links, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada