PROTECT YOUR BACK FROM PAIN The ergonomic saddle design of the seat corrects your posture to sit straight and upright, reducing strain on the neck and back. The chair provides extra comfort for prolonged sitting work. Quickly adjust to a height between 20 and 29 inches to provide comfortable seating for different sized people. Easy to assemble, good construction, durable. Maximum load: 181 kg. GOOD MOVEMENT ON SMOOTH ROLLERS - With the stool you can glide effortlessly across the room on all types of floors, whether in the work area or at home. High quality product. Why should I get a saddle stool? The saddle design helps you maintain a good posture. It also relieves your lumbar spine and neck. In this way, your back is protected from pain during long working hours. Why should I buy a FRNIAMC saddle stool with castors? The high, adjustable seat height with a vertically adjustable range of 9 inches, with the maximum height being 29.5 inches. High quality product. Product Features: Materials: Seat cushion: faux leather. 5 Star Chair Base: High Quality Aluminum Wheels: soft rubber. Specifications: Seat diameter: 40 x 40 cm. Height adjustable seat range: 20.5-29.5 inches. Chair base measures 21.5 inches. Maximum load: 400-450 lbs. Applications: doctors, artists, anesthesiologists, massage therapists, facial spa, bathroom, tattoo studio, hair salon, sewing, office.