Knee-chair helps to support your back by keeping your posture aligned Padded seat and knee-pads with memory foam keep you comfortable throughout the day. Heavy-duty base is built for long-lasting durability. Dual-wheel casters allow flexible movement. Adjustable seat height accommodates multiple users. Weight capacity tested to support up to 200 lb. Assembly required. Dimensions: 20 1/2"H x 17"W x 25 1/2"D Manual/ratchet seat height adjusts from 20 1/2" to 28".