These bed risers not only make it easy for robot vacuums to get under furniture without getting stuck, but also raise furniture for extra storage space underneath. Sofa risers also make it easier for elderly, tall, or disabled people to get up from the sofa and raise a workbench to say goodbye to back pain, and they can even lift the head of the bed to relieve reflux problems at night. Our table risers are made of thickened plastic, which is strong enough to support any heavy furniture for home or office. The internal reinforcement ribs design significantly increases its load-bearing capacity. They can safely support up to 900 kg total (when bed risers are used together). The heavy-duty bed risers can bear the weight of XL dorm bed risers, twin size beds, queen size beds, etc. The four-sided barrier protection on top can fit various furniture legs. The desk riser's recessed cups are 7 cm wide and 1 cm deep, allowing them to fit securely on bed legs, as well as comfortably on a sofa, desk, or table. Our table risers are made of thickened plastic, which is strong enough to support any heavy furniture for home or office. The internal mesh reinforcement design significantly increases its load-bearing capacity. The bulging triangle at the top and the rubberized bottom of the table risers provide a proper grip on furniture legs, shock-absorbing and non-slip to prevent furniture from sliding, protect the floor from friction, and reduce noise. Color: Black Material: plastic Package contents: 8 x Furniture heightening pad Only 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 +/- 1-3 cm.