Expansion Stem Swivel Caster W/O Brake;For 1″ Od Tubing;Exact Stem Size = .848″ Od;Wheel Size 5″;Tread Width 1 1/4″;Bore 1/2″ Id;Delrin Bearing 3/8″ Id;Beige Hub, Grey Rubber;Load Height 6 1/4″;Max Load Per Wheel Lbs. 300