This is a A-R135681 Belt, Engine Drive PN: R135681Main Description As Following : A-R135681 Belt, Engine Drive PN: R135681 Found in Section & Models : Belts > Belts: Alt, Fan, Steering, Water Pump, John Deere KNUCKLEBOOM LOADERS: 335C, John Deere KNUCKLEBOOM LOADERS: 435C, John Deere KNUCKLEBOOM LOADERS: 437C, John Deere LOG LOADER: 335C, John Deere LOG LOADER: 435C, John Deere LOG LOADER: 437C Associated Items : New Also A-JD-S-SM2019 And : Length: 61.5" Material: Polyester Cord Number Of Ribs: 8 Outside Length: 62.13" Pitch Length: 61.5" Thickness: 0.18" Width: 8 Rib