Type : Rubber Wheel Sizes : Diameter 3 inch to 10 inch Bracket type : Revolving, Fixed and Brake. Plate and Bolt size Listing is for one (1) Service Caster 3" diameter by 1.25" tread width nylon wheel. Supports 300 pounds (lbs) per wheel.When searching for a reliable and durable solution for replacement wheels for new applications or as a replacement wheel for casters and dollies, consider Service Caster’s Nylon wheels. With a plain bore with 3/8" bore for axle, Service Caster’s nylon wheels have a very low rolling resistance, show a high resistance to many aggressive substances, and are maintenance free under normal operating conditions. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward.