[Applicable Range] Each furniture caster cups' size,you can get it from the . Our rubber stoppers almost fit to all wheels used in our , it is perfect to your floor and prevent sliding. [Features] The chair stoppers have polishing surface to contact the ground to no scratches or damage of the floor (hardwood floor or tile floor). convexity design will help furniture stoppers bear heavier load and make furniture in place firmly. [Easy To ] When you want to keep your furniture stationary, you just need to put this stopper under the wheels of the furniture, and it will not move. [The Wide Range of Applications]The Funiture Stopper Suitable for all furniture with wheels such as beds, sofas, various and chairs, etc. Easy to Clean: It is easy to vacuum, but it is also easy to clean. All you need to do is wipe it with a wet towel. Colour:Black Material:rubber Size:Length 8.2cm, width 5.6cm Package Contents: 4 * Bed Stopper Caster Cups Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.