Double sealed, polished, and ground precision ball bearing, grease packed, and dirt-proof. Ground and polished steel shaft. 1-piece zinc-base casting. Individually packaged. Shaft: 10-1/8" long, 5/8" diameter. Thread end: 5/8" L.H., pulley 2" diameter V-belt size: A section. No. 1560: Shaft Length: 10-1/8", Shaft Diameter: 5/8", Pulley Diameter: 2" Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!