Boss Office Products Black Contemporary Ergonomic Adjustable Height Swivel Task Chair Mineral Gray Vanity Top 25 Starting Wattage 0 High 25 Starting Wattage 0 High Frequency Response (kHz) 0 Color Finish Black Number of Speakers 1 Electronics Included Components AC Adaptor Charger Compatible with M12 Force Logic press tool 0 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 Arm Type Fixed Swivel Yes Tilting Yes UNSPSC 56101500 Patented contemporary style design Ergonomic lumbar support 4in padded mesh seat cushion Adjustable tilt tension control Gun metal finish base with black caps Fixed arms padded with black CaressoftPlus Upright locking position Pneumatic gas lift seat height adjustment Hooded double wheel casters