Heavy-Duty Cast Iron Pulley / Bobcat 31011BPack Size:1Bobcat 31011B, Exmark 1-303073, Lesco 050186, Snapper 76398, Snapper 7076398Edgewater 509152, Green Line 32162, Green Meadow BK60, Green Meadow 48196, J. Thomas JT112-A, Landscaper Pro 212011, Mow More BOP11B, NHC 276-9675, Oregon 78-640, Prime Line 7-05333, Prime Line 7-05329, Quality 386032, Rotary 2185, Sunbelt CO-137, Sunbelt CO-138, Sunbelt B1CO137, Sunbelt B1CO138Bobcat 32", 36" and 48" decks; Exmark 32", 36" and 48" decksID: 1 ", OD: 5 3/4 ", Keyway: 1/4 ", Uses belt width: 1/2 " or 5/8", Two 5/16"-18 set screws, Offset hub