Hercules Series 24/7 Big & Tall Swivel Office Chair, 42" to 48-1/2" adjustable height, 350 lb. weight capacity, 24/7 intensive multi-shift use, multi-functional, high back design, 21-1/2"W x 5" thick molded high density contoured waterfall seat, 3" adjustable height back, fabric upholstery, built-in lumbar support, triple paddle control mechanism, infinite-locking back angle adjustment, 2-to-1 Synchro tilt adjustment, tilt tension adjustment knob, seat angle adjustment knob, seat slider lever, height & width adjustable padded pivot arms, heavy duty black powder coated metal base with foot ring, black (assembly required) (in stock items usually ship within 24 hours)