Boss Office Products Black Contemporary Ergonomic Adjustable Height Swivel Task Chair Camping Tools 9 ft) Tree Species Norway spruce 9 ft) Tree Species Norway spruce rain massage ) 275 Adjustable Height Yes Package Quantity 1 Arms Adjustable Folding No Massaging No Heated No Lumbar Support Yes Ergonomic Yes Casters Yes BIFMA ANSI Certified No CA Residents: Prop 65 Warning(s) No Swivel Yes Tilting Yes Arm Type Adjustable UNSPSC 56101500 Breathable mesh back Breathable mesh seat cushion Flip arms Spring tilt mechanism Upright locking position Pneumatic gas lift seat height adjustment 25in black nylon base Hooded double wheel casters