[ PP Material] This furniture lifter is made of high-quality materials, which is sturdy and with strong load-bearing capacity. Each set of furniture lifters can carry large furniture, which is stable and reliable, and there is no need to worry about furniture shaking. [Anti-slip and shock-absorbing] The top of this sofa lifter adopts a triangular cone design to effectively prevent furniture from sliding left and right. The bottom of bed frame lifter is made of high-quality materials to protect floor from scratches and reduce vibration and noise. [Adjustable design] This bed frame lifter can be stacked to adjust height and easily assemble to appropriate height. Stacking up and down can increase height by 8 cm/3.1 inches (about 3.1 cm), and a single layer can increase height by 5.3 cm/2.1 inches (about 2.1 cm). It expands space under bed and furniture for easy storage and cleaning. The rounded design makes it easier for bed frame lifter to match furniture legs. [Comfortable life] The bed frame lifter not only provides you with more storage space under bed, but also helps improve sleep or relieve back pain. It can help you easily adjust height of large furniture, and it is also convenient for people with limited mobility to get up from bed or sofa easily. Product name:Bed frame lifting block Applicable to:beds, sofas, washing machines, refrigerators, tables, chairs, cabinets, coffee tables, etc. Quantity:4 pieces/set Color:As Shown Material:PP Package Contents: 4 * Heavy Duty Furniture Lifters Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.