General description Adjustable chair risers designed for heavy-duty use, made from durable hard plastic that can support up to 20,000 lbs. These risers are equipped with high-density felt pads to protect hardwood, ceramic, and linoleum floors from scratches and scuffs. They provide additional height for furniture, making it easier for the elderly to get in and out of bed, while also creating extra storage space underneath. Technical specifications Material: Hard plastic Weight capacity: 20,000 lbs Adjustable leg diameter: 0''-1.5'' (0mm to 37mm) Total height: 134mm (5.3 inches) Actual increased height: 103mm (4 inches) Side length: 52mm (2 inches) Installation Step 1: Clean the table leg and keep it dry. Step 2: Align the chair legs to the center. Step 3: Use a hex screw to lock the riser in place. Usage These risers can be used to increase the height of beds, sofas, armchairs, tables, and other heavy stationary furniture, helping to alleviate shoulder and neck pain caused by low