The WOOD PNEUMATIC CHAIR by PERCH CHAIRS & STOOLS comes with STATIONARY CAPS to keep your stool from moving and firmly in place.All PERCH CHAIRS AND STOOLS are MADE IN THE USA with the best quality parts and craftmanship allowing us to offer an unheard of 12 Year Warranty on Parts and a Lifetime Warranty for Cylinders.This adjustable chair features a 7-ply hard-wood back rest which adjusts 4 ways – up, down, forward, and back for a personalized and posture correct fit.A 7-ply hard-wood ergonomically contoured waterfall seat provides improved posture and comfort. The durable 5 leg, 20" diameter black powder-coated steel tubular base is designed to withstand daily usage of 300 lbs. of weight. This wood pneumatic chair is perfect for daily use in a medical or dental office, workshop, garage, salon, spa, or at home as a kitchen counter stool.Available in the following sizes: Desk Height 17"- 22", Medium - Workbench Height 19.5"- 27.5", and Tall - Counter Height 24"- 34".SIT SMART - WORK SMART! The WOOD PNEUMATIC CHAIR by PERCH CHAIRS & STOOLS isn't just a chair, it's a tool! It's ergonomic design, world class components, and quality construction help you to work, learn, and play more effectively.