Mower Idler Pulley Replaces: 131-4529, 121-5763, 125-2532, 126-0316, 131-4506, 131-4509. 120-3335 Mower Belt Kit Replaces: 120-3335, 265-610, 1203335, 1203335. Mower Idler Pulley Dimensions: 2 3/4"L 1"H Holes: 1.4" OD 0.7" ID. Mower Belt Size: Cogged Type Belt for Drive, Total 140 tooth,Length 44", Width 3/4". Fit Models: Compatible with TimeMaster 30in Lawn Mower: 20199, 20200, 21199, 2199HD, 21200 Compatible with TimeMaster 76cm Lawn Mower: 20975, 20976, 20977, 20978, 21810, 21811 Compatible with 30in TurfMaster Walk-Behind Lawn Mower 22200, 22210, for 76cm TurfMaster Walk-Behind Lawn Mower 22205TE, 22207, for 30in TurfMaster HDX Walk-Behind Lawn Mower 22215, 22225 Compatible with Exmark Models: ECS180 CKA30000, ECKA30 Perfect Service: 2 year Warranty. If you have any questions, please feel free to contact us.