Mounting holes have been pre-tapped for easier installation, Spacer must be installed under the pulley. Installing with the spacer on top of the pulley (or failing to use spacer) result in damage to shaft and pulley. The replacement part is made of high quality aluminum alloy, and . Includes Top Nut, spindle assemblies, blade bolts kit, Mounting Bolts & grease zerk, pulley locknuts, spacer. for , , , , & ayp 42 inch , 46 inch , 48 inch and 54 inch decks. Fits for 54 inch P54ZX. for ayp/ 42 inch , 46 inch , 48 inch and 54 inch deck lawn tractors & mowers Models With 4 Screws: 187292, 192870, 532187281, 532187292, 532192870, 539112057, 587125401, 587253301. : 21546238, 21546299, 21549012. : 192870, 532187281, 532187292, 532192870, 539112057, 53911207, 587125401, 587253301. : 532 19 28-70. : 532187292 532192870. 80-12-001. rotary 11590. 82-026 and others., Weight: 3.42157430624 Pounds, Manufacturer: Tuidzljd