Wheel Diameter: 2-1/2" (Click link to find similar sized casters)Tread Width: 1-3/4"Material: Glass/ NylonLoad Rating (Per Item): 400 poundsFinish: ZincConnector Specs: Threaded Stem (1/2"-13TPI x 1-1/2")Bearing: Roller BrngLoad Height: 3-1/2"Swivel Radius: 2-1/2"Shipping Weight: 2 lbs.Usually Ships in: 24 hours (may be affected by quantity ordered)• Minimum overall height for maximum load capacity • Bright zinc-finish as standard • Optional finish: bright zinc, yellow zinc, black electrocoating, nickel, chrome (minimum order quantities apply) • Variety of connectors, brakes and wheel types available - call Apollo Caster for assistance finding the best solution.