Available with two backrest options. Physicians stools are a very important feature in any medical facility.-High, Tan Adjusts in height with a single lever handle under the seat.3 different base configurations:Black CompositeBright ChromeAluminum Base with Toe Caps2 different pneumatic height adjustmentsStandard: 17″-22″Medium: 19″-26″High: 23″-32″2 Backrest options:Upholstered BackrestCrescent BackrestWeight capacity 300 lbs.