Breewell threaded twin castor revolving chair wheel set of 5 threaded castor for revolving chairs and other revolving items. Heavy-duty caster wheels designed as direct replacement wheels for office chairs set of 5 castor twin wheels. Get smooth, quiet rolling and full swivel action all while protecting your floors. Eliminate the need for big plastic floor mats over your beautiful floors. Our safe rubber casters are the office wheels of the future. Hard, noisy, rough plastic wheels. Black and white to match and blend with any decor. Designed that a set of 5 will hold a maximum of 330 lbs total weight chair and rider. Perfect for home or office use .