Description These are tough, dependable casters in a range of sizes. Resistant to grease, oil, adhesives, kerosene-based solvents and UV, the solid polyurethane tires are extremely durable and non-marring. They have polypropylene hubs and 0.10" thick zinc-plated steel bases; slow-rolling ball bearings in the axle ensure smooth, controlled operation. Nominal sizes listed are wheel diameter by overall height, with weight capacity in brackets. Sold individually.