Adjustment System: Adjustment system allows you to adjust the pneumatic height from a seated position. Seat: Ergonomically contoured waterfall seat 19"w x 18"d x 3"h. Back: 16"w x 12"h with scuff resistant back panel adjusts four-ways: up, down, forward & back for a personalized fit. Height: Medium Bench Height 20-27" Base: Durable 5-leg 24" diameter fiberglass reinforced nylon base. Caps/Glides: Glides/Stationary Caps are like little feet that make the chair stationary. Weight Capacity: 300 lbs Our Lab line of chairs from Perch Chairs & Stools offers exceptional endurance and outstanding comfort for anyone who wants to focus better on the job and remain at peak performance for longer periods of time. The ergonomically contoured waterfall seat was designed to improve circulation and comfort. You can quickly and easily adjust the lumbar back support up, down, forward and back for a comfortable, personalized fit. And we don’t skimp on comfort, either: 3 inches of foam separate you from the supportive base of the chair. It’s also available in many colors and styles to suit any room. We’ve seen other chairs fall apart almost out of the box. Bad welds, cheap casters, poor cylinders – they’ll do your chair in quickly. That’s why we place so much importance on build quality. This model employs reinforced fiberglass nylon and steel to make sure you can trust your chair for many years to come. We promise to offer the very best quality and craftsmanship.