Steelex D2579 Fixed Heavy Duty Industrial Wheel, 8-Inch Description We call these "all terrain" caster for good reason. These solid rubber knobby tires on a steel hub with ball bearings are perfect for wet, uneven terrain or for surfaces littered with debris. They are great for use on lumber carts, and with some creativity can help make a great "off road" tool hauler for those extended projects away from the shop. These 8" fixed casters have a 4-1/2" x 4" plate and 500 lbs. capacity. From the Manufacturer Red polyurethane tire is molded onto a tough hard rubber hub. Integral roller bearings in the hub make installation on an axle shaft quick and easy. Rounded profile of the tire delivers minimal rolling resistance, and the polyurethane material will not mar or scuff floor surfaces. Features: All terrain casters Solid rubber knobby Contains One Fixed Caster Great for a wide variety of applications Product Details: Color: Black Brand: Steelex Material: Polyurethane,Rubber Unit Count: 1.0 Count Item Weight: 7.21 Pounds Manufacturer: ‎Steelex Part Number: ‎D2579 Item Weight: ‎7.21 pounds Country of Origin: ‎China Item model number: ‎D2579 Size: ‎8" Color: ‎Black Style: ‎Fixed Material: ‎Polyurethane,Rubber Pattern: ‎Wheel Item Package Quantity: ‎1 Cutting Diameter: ‎4 Inches Mounting Type: ‎Plate Mount Included Components: ‎One Swivel Caster Warranty Description: ‎90 Day Limited Assembled Diameter: ‎4 Inches Date First Available: October 29, 2011