Office Star - Office Chairs - 55M22N17 - The Shadow Air Grid Back and Mesh Seat provides stylish looks with customizable comfort and support. Easy one touch height adjustments, built in lumbar support, and tilt and armrest controls allow you to make the Shadow Air Grid your chair with the level of support that best helps you be productive. Get comfortable, get productive. Breathable Shadow Air Grid Back with Built-in Lumbar Support and Shadow Mesh Seat One Touch Pneumatic Seat Height Adjustment Deluxe 2-to-1 Synchro Tilt Control Adjustable Tilt Tension Control Adjustable PU Padded Arms Heavy Duty Angled Nylon Base with Oversized Dual Wheel Carpet Casters> Specifications: Seat Size: 20.5W x 19.5D x 3.5T Back Size: 20.5W x 19H Max. Overall Size: 42H x 26.5W x 25.25D Arms Max Inside: 18.75 Arms to Floor Min: 25.5 Arms to Seat Min: 6.25 Seat Height Min: 18.75 Seat Height Max: 23 Seat Travel: 4.25 Weight: 40 lbs.