Maxpower 10737 Idler Pulley Replaces John Deere GY20110, GY20629, GY20639 Fits S100-S130 series 42 Inch & 48 Inch decks 5-1/4 Inch OD, 11/16 Inch ID, 1-9/16 Inch Height Also fits Sabre models 14542GS, 1642HS, 1742HS, 17542HS and Scotts models L1742, L17542, L2048, and L2548