Part Name: Deck Flat Idler Pulley Part Number:AUC10172 15959 Fits Models: Compatible for John Deere Z335E ZTrak (w/ 42"Accel Deck), Z525E ZTrak, Z535M ZTrak, Z535R ZTrak (w/ 54"HC Deck), Z540M ZTrak, Z540R ZTrak. Dimensions and Specifications OD 1/8" FLAT OD 5-1/2" WIDTH 1-1/8" ID 5/8" This item is a replacement part. Please make sure the images are the same with what you want. Part Name: Deck Flat Idler Pulley Part Number:AUC10172 15959 Fits Models: Compatible for John Deere Z335E ZTrak (w/ 42"Accel Deck), Z525E ZTrak, Z535M ZTrak, Z535R ZTrak (w/ 54"HC Deck), Z540M ZTrak, Z540R ZTrak. Dimensions and Specifications OD 1/8" FLAT OD 5-1/2" WIDTH 1-1/8" ID 5/8" This item is a replacement part. Please make sure the images are the same with what you want.