Wheel Diameter: 4" (Click link to find similar sized casters)Tread Width: 1-1/4"Material: ThermoPlastic Rubber Donut (Gray)Load Rating (Per Item): 250 poundsFinish: ZincConnector Specs: Plate (2-5/8"x3-3/4"; holes: 1-3/4"x2-3/4" slots to 3"; 5/16" bolt)Bearing: Prec Ball BrngsMisc Options: Bearing CoverMisc Options: Dust CoverLoad Height: 5-1/4"Swivel Radius: 3-3/8"Shipping Weight: 2.25 lbs.Usually Ships in: 2-3 Weeks (may be affected by quantity ordered)• Constructed of high-strength steel for added durability • Raceway dust cover for increased caster life and performance • NSF approved (less thread guards) • Dual ball bearing aceway • Durable zinc finish • 3/8” diameter nut and bolt axle • Full and partial thread guard options help prevent debris from entangling wheel • Ideal for: Store Fixtures, Storage Equipment, Utility Carts, Institutional Equipment, Office Equipment, Food Service, Material Handling Equipment, Hospitality Carts