Perch Wood Rolling Pneumatic Stool All Around Adjustment Ring and Wheels for Hardwood or Tile Floors, Workbench Height 360 All Around pneumatic height adjustment lever that can be operated from any position, a 7-ply high quality hard wood 13.5" diameter swivel seat. FOR WOOD, CERAMIC OR TILE FLOORS A quarter inch glossy rubberized coating encompasses the wheel perimeter of our HARD FLOOR CASTERS, allowing this height adjustable stool to roll on hardwood, ceramic, and tile floors without scratching or damaging the floors surface. 12 YEAR WARRANTY  IF A PART WEARS OUT, WE REPLACE IT FOR FREE! We proudly stand behind the superior quality and craftmanship of all Perch Chairs & Stools with a 12 Year Warranty on parts and a Lifetime Warranty on cylinders. Made in the USA - Guaranteed Quality. AVAILABLE IN 2 SIZES - Desk Height 15"- 21", Medium - Workbench Height 18"- 26". BUILT FOR RIGOROUS DAILY USE Designed to be used all day - every day! The spacious 7-ply high quality hard-wood 13.5" diameter swivel provides improved posture and comfort. A durable 5 leg, 21" diameter fiberglass reinforced nylon base allows for daily usage of up to 300 lbs of weight. A perfect pneumatic work stool to use in a medical or dental office, workshop, garage, salon, spa, or at home as a kitchen counter stool.