This is a A-56606 Belt PN: 56606Main Description As Following : A-56606 Belt P.N: 56606 Dim A (1): 7/8" x 148"Replaces: 56606 Stocked As: A-C144 Found in Section & Models : Belts > Hay and Forage Belts, Hesston SWATHER/WINDROWER: 300SP (1971-1972) Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 7/8" x 148" Replaces: 56606