This is a A-56580 Belt PN: 56580Main Description As Following : A-56580 Belt P.N: 56580 Dim A (1): 7/8" x 166"Replaces: 56580 Stocked As: A-C162 Found in Section & Models : Belts > Hay and Forage Belts, Hesston SWATHER/WINDROWER: 420 (1971-1976, 10', 12' & 14'), Hesston SWATHER/WINDROWER: 520 (1971-1976), Hesston SWATHER/WINDROWER: 6200 (1976-1977), Hesston SWATHER/WINDROWER: 6400 (1975-1977) Associated Items : New Also A-CY-S-170225, A-HES-O-6400WIND, A-HES-S-HYDWIND, A-MH-S-ENGA4236 And : Dim A (1): 7/8" x 166" Replaces: 56580