Brand New and High Quality! Our table risers are made of high quality thickened PP plastic, which is strong enough to support any heavy furniture for home or office. The internal mesh reinforcement design greatly increases its load-bearing capacity. Top bumps and rubber bottom of the desk risers can firmly grip the furniture legs, shock absorbing and anti-slip to avoid furniture sliding, protect the floor from friction and reduce noise. These bed lifts risers not only make it easy for robotic vacuum go under furniture without getting stuck, but also raise furniture for additional storage space.