BL-X-5M-BK-GG Mid-Back Black Mesh Swivel Ergonomic Task Office Chair with Flip-Up Arms

Mid-Back Design Back Width: 17-20" Ventilated Mesh Back Built-In Lumbar Support Tilt Lock Mechanism rocks/tilts the chair and locks in an upright position Tilt Tension Adjustment Knob adjusts the chair's backward tilt resistance Padded Black Mesh Upholstered Seat CA117 Fire Retardant Foam Waterfall Seat reduces pressure on your legs Swivel Seat Pneumatic Seat Height Adjustment Padded Flip-Up Arms Heavy Duty Nylon Base Dual Wheel Casters Single Unit Weight: 33 lbs Fixed Width: 24.5 Inches Fixed Depth: 25.5 Inches Minimum Height: 37.500 Inches Maximum Height: 41.250 Inches Minimum Arm Height From Floor: 26.250 Inches Maximum Arm Height From Floor: 30.250 Inches Fixed Arm Height From Seat: 8 Inches Minimum null: 17 Inches Maximum null: 20 Inches Fixed Back Height From Seat: 23 Inches Fixed Seat Width: 20.25 Inches Fixed Seat Depth: 19 Inches Minimum Seat Height: 17.250 Inches Maximum Seat Height: 20.750 Inches Seat Thickness: 3 Inches Degree of Swivel: 360 Degrees Weight Capacity: 250 lbs