This is a A-OL50DIMP 50 Double Offset Link (Import) PN: OL50DIMPMain Description As Following : A-OL50DIMP 50 Double Offset Link (Import) P.N: OL50DIMP A-OL50DIMP 50 Double Offset Link (Import) P.N: OL50DIMP Replaces: SWC50DOL JOHN DEERE , Crossed From: 50DOF , , 673-HD50 , , 673HD50 , 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