Adjustment Lever: A 360° "All-Around" pneumatic height adjustment lever that allows you to quickly adjust the pneumatic stool height from anywhere you reach under the seat. The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical, Lab & Caregiving Furniture\Dental Examination Chairs". The seller is "dentaljoy" and is located in this country: US.This item can be shipped to United States.