Wheel Diameter: 3" (Click link to find similar sized casters)Tread Width: 1-13/16"Material: Glass/ NylonLoad Rating (Per Item): 1200 poundsFinish: ZincConnector Specs: Plate (3-1/8"x4-1/8"; holes: 2-3/8"x3-3/8"; 5/16" bolt)Bearing: Roller BrngLoad Height: 4-1/8"Swivel Radius: N/AShipping Weight: 2.5 lbs.Usually Ships in: 7-10 business days (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.