This is a A-555118R1 Belt, Roller Secondary Drive PN: 555118R1Main Description As Following : A-555118R1 Belt, Roller Secondary Drive P.N: 555118R1 Dim A (1): 5/8" x 183"Replaces: 555118R1 Stocked As: A-B180 , Crosses To: A-B1B180 CASE-IH Found in Section & Models : Belts > Hay and Forage Belts, Case-IH SWATHER/WINDROWER: 75 (18', 21', 25') Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 5/8" x 183" Replaces: 555118R1