This part is commonly Used on models:
78455 44"" and 52"" Twin Soft Bagger, 100 Series Z Master
78507 44"" and 52"" Twin Soft Bagger, Z100 Z Master
78531 48in E-Z Vac Bagger, Z400 Series Z Master Mowers
78532 52in E-Z Vac Bagger, Z400 Series Z Master Mowers
LHPUV4448 Ultra Vac LHP
LHPUV4650 Ultra Vac Lazer HP
LHPUV52 Ultra Vac LHP
LHPUV5256 Ultra Vac Lazer HP