Master Caster Gemini Heavy-Duty Chair Mat Casters - 3in Diameter - 220 lb - Urethane - Black, Gray - 5 / Set

Weight Rating: 220 lbs/Caster. 5/Set. Built strong, perfect for hospitals, fits most medical applications. Prevents damage to chair mats and other hard floor surfaces. Eliminates hazards such as sliding, skating and run-away chairs. 7/16in dia. x 7/8in long stem fastener with dual grip ring technology eliminates excessive noise. Grey and Black Finish. 3in diameter heavy-duty twin wheel casters.