Thick padded contour seat and back with built-in lumbar support, one-touch pneumatic seat height adjustment and 2-to-1 multi-function control with adjustable tilt tension Heavy duty nylon base with dual wheel carpet casters Height and width adjustable arms with soft polyurethane foam pads Overall size: 28” W x 23.5” D x 37.25 - 40.5” H - Approved for commercial use GREENGUARD Certified - an interior product made with materials that have low chemical emissions, improving the quality of the air in which it is used