Roller bearing 11/16X1 - 9/16X15/32 ORIGINAL BRIGGSeSTRATTON ride-on mower lawn mower MURRAY models: ZT 7000, 18HP Hydro - 20HP ZTS 7500, 20HP SIMPLICITY models: 870DC, 8HP 24" - 1080DC,10HP - 4211, 11HP Hydro 560, 5HP 24" - 870, 8HP 24" - Coronet, 11HP - Broadmoor, 15HP Hydro SNAPPER models: 9247E, 24" 9 HP - 10287E, 28" 10 HP T - 11327E, 32" 11 HP 12387E, 38" 12 HP T - E9247, 24" 9 HP Dimensions: Outer diameter: 40.08 mm Inner diameter: 17 mm Height: 12.07 mm