Flash Furniture HERCULES Series 24/7 Intensive Use Big & Tall 400 lb. Rated Black Leather Executive Swivel Chair with Lumbar Knob Contemporary 24/7 Multi-Shift Use Office Chair 400 lb. Weight Capacity High Back Design with Headrest Pressurized Lumbar Support Knob Tilt Lock Mechanism Tilt Tension Adjustment Knob 4'' Thick Foam Padded Seat Contoured Seat offers plush comfort 24'' Wide Seat Waterfall Seat promotes healthy blood flow