Our bed lifts risers are made of high quality thickened PP plastic that can hold up to 6,000 pounds and are strong enough to support any heavy furniture like bed, chair, desk, cabinet, sofa, table, TV stand for home or office. The internal mesh reinforcement design of the couch risers 4 inch heavy duty greatly increases its load-bearing capacity. The bed risers heavy duty can carry the weight of bed raisers for dorm twin xl, king size bed, queen bed, etc.