This part is commonly Used on models:
78521 Chute Gate Kit, 48in, 52in and 60in Mowers for Z400 and Z500 Series Z Master Riding Mowers
78522 Chute Gate Kit, 72in Mowers for Z500 Series Z Master Riding Mowers
117-3600 Operator-Controlled Discharge Chute Kit
144-2688 48in Chute Gate Kit, Z Master 4000 Series Riding Mower
144-6571 52in Chute Gate Kit, Z Master 4000 Series Riding Mower
144-6572 60in Chute Gate Kit, Z Master 4000 Series Riding Mower
163-4118 48in Chute Gate Kit, Z Master 2000 Series Riding Mower
163-4119 52in Chute Gate Kit, Z Master 2000 Series Riding Mower
163-4120 60in Chute Gate Kit, Z Master 2000 Series Riding Mower