Fully wrapped roller protective cover, lock design, not easy to fall off. Elastic rubber, easy to install. Thickened felt pad to protect the floor from scratches, quiet and wear-resistant. Prevent the casters from rolling freely, and can easily push the foot wheelchair. Waterproof and moisture-proof, anti-aging Colour: Black Material: TPE Package Contents: 5 x Chair Wheel Stopper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.