ObboMed SS-2700 360&deg; Rotation Compact Portable Swivel Seat Cushion with Non-Skid Durable Wooden Base and Washable Cover, Easy Movement for Back, Hip, Tailbone Pain Suffers, Size 15&rdquo; x 2&rdquo;, 1 Piece Turns any ordinary chairs into swivel chairs, reducing the strain and stress on your back and hip when getting in and out of the seat, especially suitable for those who suffer tailbone, back and hip injuries. Non-skid wooden base is strong and durable after long-term use; come with a removable washable cover for personal hygiene maintenance. Ball-bearing roller mechanism allows easy movement; 360 smooth turning without binding. 1 inch thick padded seat can hold up to 300 lbs. Please make sure the seat surface you intend to put this swivel seat on is flat and at least 15 inches wide in order for this swivel seat to function properly. For Car seat, please check SS-2710 specially designed for using in car (12 inches wide) https://www.amazon.com/dp/B00X93DL42 Ball-bearing roller mechanism allows easy movement; 360 smooth turning without binding. Reduce strain and stress on your back and hip while getting in and out of seated position. Wooden base is strong and durable after long-term use. Suitable for most chairs. Come with a washable cover for personal hygiene maintenance. Made of fire-retardant materials to ensure maximum safety. Time-endurance home/office essentials for those who suffer tailbone, back, and hip injuries. 1 x Swivel Seat Cushion Dimensions: Diameter: 15 x 2 inches / 38 x 5 cm Thickness: 1 inch / 2.5 cm padding and 1 inch / 2.5 cm wooden base Max. Support Weight: 300 lbs / 130 kg Color: Dark Blue Pattern Material: Jacquard fabric, wooden base, and polyurethane foam Latex: No