Hercules Series 24/7 Big & Tall Swivel Office Chair, 45-1/4" to 49" adjustable height, 400 lb. weight capacity, 24/7 intensive multi-shift use, multi-functional, high back design, 24"W x 5" thick molded high density contoured seat, ventilated mesh back, fabric upholstery, adjustable height lumbar support, reinforced back with metal frame support, dual paddle control mechanism, 2-to-1 Synchro tilt adjustment, tilt tension adjustment knob, height & width adjustable padded pivot arms, CA117 fire retardant foam, heavy duty black powder coated metal base, dual wheel casters, black (assembly required) (in stock items usually ship within 24 hours)