DOP78-113JD John Deere Heavy Duty V Idler Pulley fits commercial front mount 50, 60 & 72 decks, Mule drive on 140, 300, 316, 317 & 318 , Primary mower drive on 110, 122 & 200 series, 38" 2 blade mower deck, 46", 50" & 60", 41 & 48 decks. Heavy Duty pulley with welded seam. Size: 4-1/2" OD, 13/16" Width, 3/8" Offset. Replaces # AM38171 & AM103542.