[Perfect for Thin Legged Furniture] This bed riser has a rounded design with an inner diameter of 4.7 cm / 1.85 inches and an outer diameter of 6.7 cm / 2.64 inches, which is suitable for furniture legs with a rounded diameter of up to 1.8 inches or square sides of up to 1.3 inches in length. The top and bottom can be stacked together for an additional 3.1 inches of height when used together. [High Quality ABS Plastic and Rubber] This furniture riser is made of ABS plastic and rubber, which is stable and has good weight-bearing capacity. Each set of furniture riser can hold large furniture weighing up to 6,000lbs, stable and no need to worry about the furniture wobbling. [Non Slip and Vibration Reduction] The top of this sofa riser is designed with a triangular cone, which effectively prevents furniture from sliding from side to side. The bottom of the 3-inch bed frame riser is designed with TPU non-slip rubber, which protects the floor from scratches and reduces vibration and noise. [Adjustable Design] This bed lifts riser can be stacked and used thus adjusting the height, it can be easily assembled to the right height. Stacking the upper and lower layers can increase the height by 8cm / 3.1 inches, using only one layer can increase the height by 5.3cm / 2.1 inches. It extends the space under beds and furniture for effortless storage and cleaning. The rounded design makes it easier to match the bed raising block to the furniture legs. [Comfortable Life] The bed riser not only provides you with more storage space under the bed, but also helps to improve sleep or relieve back pain. It helps you to change the height of large furniture easily, and also facilitates to allow people with mobility problems to get up from the bed or sofa easily.