High quality Solid Brass Castor Cups with an Antique finish. Ideal for use on carpeted floors, or simply add self adhesive felt pads to protect hard floors. These carpet coasters protect floors from marking and scratching, which can be caused by furniture with casters. They have an internal width of 48mm maximum. Suitable for all castors in any wheel size below 48mm diameter as they are intended as an embellishment. They come in a set of four cups.