"This Fairbanks Phenolic/Canvas Swivel Caster is ideal for applications where smooth, quiet and mobile operation is required. Caster Type Swivel, Casters qty. 1, Finish Type Zinc-plated, Overall Height in. 5, Bearing Type Roller, Capacity lbs. 300, Wheel Type Phenolic canvas, Wheel Width in. 1.25, Post in. 1/2-13 x 1, Wheel Diameter in. 4. Durable construction and cold-formed Rust-resistant electro-galvanized zinc finish Phenolic/canvas wheel Stem dimensions 1/2 in. dia. x 1 in. L, 13 threads per in."