High Quality: Round shape bed caster cups are made of rubber, odorless and safe to use. Solid rubber design does not harm your floor and prevents scratches from casters, keeping your furniture firmly in place.Prevent Scratches: Protects hardwood floors and tile-like surfaces from scratches. Keeping the contact area clean maximizes the anti-slip effect of the furniture cups.Fits Most Wheels: Outer size is 84mm x 8mm, inner size is 67mm x 36mm x 5mm. Suitable for most furniture wheels.Widely Used: Caster cups protect various floor surfaces from indentation caused by bedroom or household furniture. Compatible with hardwood, linoleum, laminate, ceramic tile, and carpet. Ideal for beds with wheels, couches, chairs, desks, tables, sofas, recliners, dressers, and bed frames.Easy Installation: Simply place the product under each wheel of the furniture to effectively secure it in place. Installation does not interfere with cleaning activities such as vacuuming.Color: Gray Material: Rubber Package Contents: 4 x Furniture caster cups Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.