Use screw clamp adjust fixing, wrapped furniture legs are not easy to .3 cm grooves sinking, when you moving will not .Added height not only make usable space under beds, also allows vacuum cleaners or robot vacuum work more flexibly.Avoiding shoulder pain and neck pain caused by low height of furniture.They also make more convenient for the elderly to in and out of bed.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 of up to 20,000 .High density bottom felt pads your hardwood, ceramic tile linoleum floors and carpet from scratches and .Colour:brownMaterial:plasticPackage Contents:4 x Chair RisersOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.