The Eurotech Concept 2.0 Ergonomic Office Chair has many built in ergonomic features at a reasonable price. This affordable office chair has all the bells and whistles of a more expensive chair such as 3D mesh back, Single Paddle Lever, Seat Height Adjustment, Arm Height Adjustment, Tilt tension control, and much more. The Concept by Eurotech is a highly adjustable ergonomic mesh task chair with multiple adjustments that make this chair comfortable for all day sitting. Dimension 26"W x 25.5"D x 38-43.5"H Seat 20"W x 19"D Back 20"W x 22"H Seat Height 18-22"H Weight 64.5 lbs Tilt Tension Control Tilt Lock Back Angle Adjustment Synchro-Tilt Seat Height Adjustment Waterfall Seat 2.8" Ratchet Back Height Adjustment Seat Depth Adjustment Width Adjustable Arms Arm Height Adjustment Swivel Arm Arm Depth Adjustment Unique 3d Mesh Single Lever Adjustment Greenguard Certified