[Adjustable Bed risers with Screw Clamp]Bed risers with screw clamp, use screw clip adjust fixing,with grooves moving not tilt, wrapped furniture legs are not easy to fall. 4 Inch Lift Bed and Furniture Risers Fit Round or Square legs diameter from (0 inch-2 inch).[ Material]Adjustable desk riser blocks made of heavy-duty strong hard plastic, which can stand the weight of the heaviest of furniture in your home or office, they can safely support a total of up to 20000 lbs. Heavy duty furniture lifter 't crack like other risers.[Silent & wear-]The bottom of chair raisers is made of High Density felt furniture pads Bottom, protecting your floors from scratch. It can easily move heavy furniture without making a loud noise, it be the for your heavy furniture.[Anti-rust & moisture-proof]Our furniture risers are made of materials that are rust-proof and moisture-proof, so you don't have to worry about the sofa cushions moldy even when you clean . And the sofa cushion is suitable for most tables and chairs, sofas, dressers, armchairs and beds, etc.[Create Space]Chair leg extenders not only does it add storage space under the bed, but it also adds height. The table leg extender also makes it easier for the elderly to get in and out of bed. The right height makes furniture more comfortable and easier to clean underneath, especially with robot vacuums.size: Height increase: 10cmMaterial: plasticcolour: blackPackage Contents:4 x Bed RisersOnly 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.