Physician Exam Stool with Single Lever Release and Black Composite Base Standard height adjustment: 17" to 22" Seat diameter: 16" Base diameter: 24" California 117 fire resistant foam 3/4" thick composite substrate with steel reinforcement plate Weight Capacity 300 lbs COM Requirements 1 yd 961 Options Back Rest (Order Ex. 961-B) 18 Polished Chrome Foot Rest (Order Ex. 961-F) 7" Stroke Cylinder: 19" - 26" (Order Ex. 961-7) 10" Stroke Cylinder: 23" - 33" (Order Ex. 961-10) Procedure Arm (Order Ex. 961-PA) Soft Wheel Casters or Glides (Please specify)