STURDY ZINC ALLOY MATERIAL AND FELT PAD The furniture riser is made of sturdy zinc alloy material and felt pad, with a fashionable look, which can be matched with the furniture and the floor. The felt cushion at the bottom protects the floor, reduces noise and drags furniture. It is a perfect home accessory.ADJUSTABLE TO INCREASE 7-10cm/2-5/8" to 4" The chair riser is raised up to a minimum of 7cm and can be raised up to 10 cm by turning. The chair riser adopts ergonomic design. By adjusting the direction and height, you can freely change the sitting position and view, without worrying about the humpback problem caused by the low chair.45 ROTATING DESIGN The chair riser can be adjusted 45 freely, so there is no need to worry about the unevenness of the floor, which solves the tilt problem of traditional chairs. The side screws firmly grip the chair legs, and the chair can be moved at will without falling.CHECK THE SIZE BEFORE PURCHASING Length X Width X Height: 5X5X10cm, support 2000Ibs, suitable for to furniture legs with a diameter of 3-4cm (1-1/8" to 1-5/8"), can be used in restaurants, officesoms and living rooms, etc. Please confirm the size before purchasing.HOW TO USE Keep the furniture legs dry and clean, and put them into the foot pads. Adjust the height of the footrests. Fix the screws with tools. Check the stability of the chair before you can use it.