These 40mm Single wheel felt glides are designed to fit a 40mm castor exactly, to prevent them falling off. The wheel simply snaps into position when pushed into the cup and stays in position. The non marking felt allows furniture to be moved easily along any smooth surface without causing any damage. Manufactured in the UK to a high quality, these castor cups are ideal for furniture that will be placed and moved around on a wooden, laminate or any other smooth surface. Each pack contains 4 Felt glides. Available in beige and cream. The ideal solution to prevent castors marking or damaging flooring.