Features: Make of PA6 and 30% fiber, it can bear the weight of the furniture in the home or office. This furniture risers have a felt pad on the bottom that will not scratch floor (including carpet and hardwood floor) and protects them from harm. Easy to install. Use screw clip to adjust and fix, so the wrapped furniture legs is not easy to fall. Suitable for bed, sofa, couch, desk, table, chair, and other furniture. It have strong bearing capacity and avoids the inconvenience caused by too low furniture. The increased height not only makes available space under the bed, but also makes the vacuum cleaner or robot vacuum cleaner flexible. Specifications: Component: PA6 and 30% fiber Type: Black Widening/Brown Widening/Gray Black/Brown Widening Size: about 7.5x7.5x13.8cm/2.95x2.95x5.43inch Gray Size: about 5.5x5.5x13cm/2.17x2.17x5.12inch Package Includes: 4Pcs Adjustable Chair Feet risers note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.