Casters Improve Bed Mobility Bed casters or bed frame wheels make the moving or shifting of beds effortless on carpeted or rug covered floors. Not recommended for use on wood floors. Come in brown polypropylene wheels, with a yellow zinc finish. Dimensions and Duty Rating These light duty furniture casters have a 1-5/8" Brown wheel. Features a yellow zinc caster with a (3/8" x 1-9/16") grip neck socket stem. Plastic Plug Inserts Plastic Plug Inserts are optionally available by selecting them at the right. These plastic inserts are made to be inserted in your bed frame to facilitate the correct fit for your casters. The price of the plastic inserts will be automatically discounted in the cart if purchased together with these wheels. Sold Singly These casters are priced "each", so a quantity of 2 will yield two casters.