This is a A-BS100BL Bucket Style Seat, BLK PN: BS100BLMain Description As Following : A-BS100BL Bucket Style Seat, BLK P.N: BS100BL Flat horizontal slotted base plate w/ up to 3" fore/aft adjustment. Found in Section & Models : Seats > Complete Seats, Hesston (UNDEFINED): SEVERAL Associated Items : A-BS100RD Also This is An Aftermarket Product And : Flat horizontal slotted base plate w/ up to 3" fore/aft adjustment.