This is a A-57158 Belt, Bale Thrower Drive Assembly PN: 57158Main Description As Following : A-57158 Belt, Bale Thrower Drive Assembly P.N: 57158 Dim A (1): 5/8" x 108"Dim B (2): Dbl AngleReplaces: 57158 Stocked As: A-BB105 , Crosses To: A-HF28910 WIX Found in Section & Models : Belts > Hay and Forage Belts, Hesston BALER, SQUARE: 4450, Hesston BALER, SQUARE: 4570, Hesston BALER, SQUARE: 4590 Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 5/8" x 108" Dim B (2): Dbl Angle Replaces: 57158