Boss Office Products Mesh Task Chair with Adjustable Arms, Black: * Open mesh back designed to prevent body heat and moisture build up * Solid metal back frame with a ballistic nylon wrap * Breathable mesh fabric seat with ample padding * Adjustable height arm rests with soft polyurethane pads * 25" nylon base * Adjustable tilt tension control * Hooded double wheel casters * Upright locking position * Pneumatic gas lift seat height adjustment * Mesh upholstery and nylon base construction * 6-year warranty * Dimensions: 25"L x 25"W x 38.5"H * Model# B6216