[Unique rubber caster cup design] It can lock the furniture or bed wheel in place, while protecting the hardwood, ceramic tile, linoleum and floor surface from the indentation of the bedroom or . Safe and effective, suitable for any floor-hardwood, linoleum, laminate, ceramic tile, carpet, etc.[Unique anti-skid design] The bottom is , using electrostatic adsorption technology, so that the furniture casters can the wooden floor or surface. Therefore, it is difficult to the floor and has a lot of friction.[Size] 10 black furniture coasters are round 3 inches (approximately 7.6 cm), which is very suitable for all furniture rollers-1.8 inches wide (approximately 4.8 cm), depth 0.2 inches (approximately 0.5 cm). 8 non-slip caster cups, each cup can hold 550 pounds (250 kg).[High- raw materials, easy to use and clean] The caster cup is made of rubber material, no odor, no harm to the human body, and durable. Simply under the bed wheels or furniture legs to instantly your floor and keep the furniture still. Easy to clean and can be cleaned with water.[Wide range of applications] This stopper can fit your bed, equipped with wheels, couches, chairs, sofas, recliners, , dressers, pianos, sofas, . rubber caster cup will stop it all at onceType: Bed Stopper Caster Cupscolor:BlackMaterial:rubberPackage Contents:10 x floor non-slip padsOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.