PERCH Ergonomic Industrial Chair with Footring for Hardwood or Tile Floors, Counter Height EASE ADJUSTMENT SYSTEM Perfect for use in medical, dental, or other office environments, this industrial rolling chair features an Ease Adjust System which allows you to adjust the pneumatic height and lumbar back support from a seated position. The lumbar support adjusts 4 ways  up, down, forward, and back for a personalized and posture correct fit. 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 chair 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 3 SIZES - Desk Height 17"- 22", Medium - Workbench Height 20"- 28", and Tall - Counter Height 22"- 32". BUILT FOR RIGOROUS DAILY USE Designed to be used all day - every day! The self-sealing polyurethane back support and seat provide improved posture and comfort. A durable 5 leg, 24" diameter fiberglass reinforced nylon base allows for daily usage of up to 300 lbs of weight. A perfect ergonomic industrial chair to use in a medical or dental office, workshop, garage, salon, spa, or at home as a kitchen counter stool.