Features:1. ROBUST STEEL MATERIAL: Adjustable furniture risers made of heavy-duty, strong, solid carbon steel, which can withstand the weight of the heaviest furniture in your home or office. They will not crack like other risers. 2. SCREW CLAMP FIXED & DOES NOT FALL OFF: Use screw clamp to adjust the fixation, wrapped furniture legs are not easy to fall off. Suitable for sofa, table, desk and easy to install.3. ADJUSTABLE WIDTH: Adjustable widths are 1-3.7 cm, can increase the height by 5 cm and 10 cm respectively.4. INCREASED ADDITIONAL HEIGHT: Provides extra height, not only storage space under beds, but also extra height allows vacuum cleaners or robot vacuum cleaners to work more flexibly. They also make it more convenient for the elderly to get in and out of bed. 5. PROTECT YOUR HARD FLOORS FROM SCRATCHES: Heavy-duty and smooth edges safely handle the weight without causing any dents or cracks on wooden floors or hard surfaces. Protect your wooden floors, ceramic tiles and linoleum floors from marks and scratches.Specification:Material: Plastic Product color: Black, Brown Product size: 5cm, 10cm Product weight: 180g, 305g, 360g, 610gPackage includes:2 / 4 x Adjustable Furniture Risers