Plastic Elevate up 1 or 3 inch: The size of dorm bed risers: 3.3 * 3.3 * 3 inch. If you want to stack ,please place the "L" side at the top Our bed risers heavy duty are built with high-quality construction that ensures durability and stability.The maximum load-bearing of table legs risers are 1300 lbs. Great for christmas tree box riser 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 The furniture risers 3 inch are incredibly easy to use – simply place raisers blocks under your furniture legs and enjoy the benefits of improved posture 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, our bed risers 3 inch are the perfect solution 4 pack bed risers 3 inch heavy duty