Sold as 1 Each. Mesh Task Office Chairs. Seat Dimensions: 17.25' - 20.75'H x 20.25'W x 19'D. Care Instructions: S-Solvent based cleaner - no water. Contemporary Task Office Chair with Flip-Up Arms. Tilt Lock Mechanism rocks/tilts the chair and locks in an upright position. Pneumatic Seat Height Adjustment. Color: Blue Mesh; Material: Foam, Mesh, Metal, Plastic, Plywood. Back Dimensions: 17'W x 23'H. Assembly Required. Mid-Back Design with breathable mesh material. Tilt Tension Adjustment Knob adjusts the chair's backward tilt resistance. 5-Star Nylon Base with Dual-Wheel Casters. Ergonomic - Built-in Lumbar Support; Waterfall Seat. Flip-Up Arms. ANSI/BIFMA compliant for safety. Back Width: 17-20'. Padded Blue Mesh Upholstered Seat with CAL 117 Fire Retardant Foam. Overall Dimensions: 24.5'W x 25.5'D x 37.5' - 41.25'H. Rated for up to 250 lbs Based on 6-8 Hours Use. Warranty: 1 Year Limited. Built-In Lumbar Support. Waterfall Seat reduces pressure on your legs.