[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] Furniture stopper caster cups protect floor surfaces from indentation caused by bedroom or household furniture. Safe and effective on hardwood, linoleum, laminate, ceramic tile, and carpet. Ideal for beds with wheels, couches, chairs, desks, tables, sofas, recliners, dressers, bed frames, and more. [Easy Installation] Simply place the product under the four wheels 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 Only the above package content is included; other products are not included. Note: Light reflection and different display settings may cause slight color variations between the item and the image. Measurement error allowance is +/- 1-3cm.