All-Day Ergonomic Comfort Meets Stability in the 5356 After a long day in the exam room, you’ll appreciate the ergonomic comfort of the 5356 with it’s wrap-around backrest, easy height adjustment ring, and stable base. Features 19.75″ diameter base Seat height range is 20″ to 27″ Unique wraparound arm offers exceptional abdominal, back or arm support, and is perfect for lengthy procedures Stool height adjusts via a control ring located under the seat. To raise stool, ease weight off and a pneumatic assist will raise the seat. Lift up ring, and the stool gently descends to the desired height. Five legs distribute weight evenly and ensure stability Standard with hard rubber castors Available in a variety of upholstery colors Made in U.S.A.