Plastic The size of furniture risers 1 inch ((W*L*H)): 3 * 3 * 1.5 inch. The internal size((W*L*H)): 3 *3 *0.3 inch Our 1.5 inch bed risers heavy duty are built with high-quality construction that ensures durability and stability.The maximum load-bearing of table legs risers are 2300 lbs Risers for bed frame are match with the TPU rubber bottom layer, which effectively absorb shock and protects your floors from scratches, and"L" side design ensures a perfect match for your furniture and eliminates mismatch worries These heavy duty bed risers can be applied to raise beds, couches, chairs, cabinets, tables,TV stands, Desk. Simply place bed raisers blocks under your furniture legs and enjoy the comfortable height and get more under bed storage These table leg extenders are perfect for anyone looking to create a more comfortable and ergonomic environment at home or work. Whether you suffer from back pain, have trouble getting in and out of bed, or simply want to improve your overall health and well-being, BTSD-home bed risers are the perfect solution Furniture Risers 1 inch 4 Pack