[Adjustable Bed risers with Screw Clamp]Bed risers with screw clamp, use screw clip adjust fixing,with grooves moving will 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). [High Quality 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 won't crack like other risers. [Silent & wear-resistant]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 will be the best choice for your heavy furniture. [Anti-rust & moisture-proof]Our furniture risers are made of high-quality materials that are rust-proof and moisture-proof, so you don't have to worry about the sofa cushions getting moldy even when you clean the house. 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: 10cm Material: plastic colour: black Package Contents: 4 x Bed Risers