[ rubber caster cup design] It can lock the furniture or bed wheel in place, while protecting the hardwood, ceramic tile, linoleum and floor from the indentation of the bedroom or . Safe and effective, suitable for any floor-hardwood, linoleum, laminate, ceramic tile, carpet, etc. [ anti-skid design] The bottom is smooth, using electrostatic adsorption technology, so that the furniture casters can slip on the wooden floor or smooth . Therefore, it is difficult to the floor and has a lot of friction. [Size] 32 black furniture coasters are round 3 inches (approximately 7.6 cm), which is very suitable for almost all furniture rollers-1.8 inches wide (approximately 4.8 cm), depth 0.2 inches (approximately 0.5 cm). 32 non-slip caster cups, each cup can hold 550 pounds (250 kg). [High-quality raw materials, easy to use and clean] The caster cup is made of rubber material, no odor, no harm to the human body, and . under the bed wheels or furniture legs to instantly protect your floor and keep the furniture still. Easy to clean and can be cleaned with water. [Wide range of applications] This fun stopper can fit your bed, equipped with wheels, couches, chairs, sofas, recliners, desks, dressers, pianos, sofas, . Our rubber caster cup stop it all at once! colour: black Material: rubber Package Contents: 32 x floor non-slip pads 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.