SET OF 2 - John Deere Original Equipment Idler - DC33766. This fits Round Baler models: 440E, 446 & 546, 447, 448, 449, 450E, 450M, 456, 556, 457, 557, 458, 458S, 459, 459E, 460M, 460R, 466, 566, 467, 567, 468S, 469, 547, 550M, 558, 559, 560M, 560R, 656, 575, 568, 569, 572, 582, 592, 854, 960. Specification: Diameter 0.315", Groove Diameter 3.000", Width 0.630", Bore Size 0.315", Material NYLON. This is a genuine John Deere part. Thanks for looking!