PERCH Rolling Single Lever Height Adjustable Swivel Stool for Carpet or Linoleum, Workbench Height, Imperial Blue Vinyl ERGONIMIC ADJUSTMENT SYSTEM Perfect for use in medical, dental, or other office environments, as a drafting stool, in a work shop, or at home. This rolling height adjustable stool a single fixed position pneumatic height adjustment lever that allows you to adjust the pneumatic stool height. FOR CARPET OR LINOLEUM Our SOFT FLOOR CASTERS by PERCH CHAIRS & STOOLS are designed to easily roll over carpeting without snagging, and over linoleum without denting or tearing. 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 WITH 12 SEAT COVER OPTIONS Choose from 12 fabric and vinyl colors to find the perfect seat cover for this medical stool. Vinyl is antimicrobial/antibacterial protected with an anti-stain finish. Available in: Desk Height 18"- 23", Medium - Workbench Height 20.5"- 28", and Tall - Counter Height 24"- 34". BUILT FOR RIGOROUS DAILY USE Designed to be used all day - every day! A 3.5" padded 14.75" diameter seat 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. This is the perfect ergonomic rolling height adjustable stool to use in a medical or dental office, workshop, garage, salon, spa, or at home as a kitchen counter stool.