Executive high-back chair, a part of the HON Sensible Seating Series, offers a passive ergonomic design. Seat and back flex independently of each other to allow the back to recline 2 degrees for every 1 degree of seat recline. Seat has an independent action from 4 degrees to negative 1 degree. Deeply contoured foam cushion on seat is 2-3/4" thick. Back has a 1-1/2" thick urethane foam cushion. Functions include pneumatic seat-height adjustment from 16-1/2" to 21", 360-degree swivel, dual-action synchro-tilt, tilt tension and tilt lock. Five-star base has 2" hooded dual-wheel casters. Seat measures 20-1/4" wide x 18-1/2" deep. Usable seat depth is 18-1/2". Back dimensions are 19" wide x 22" high. Chair is certified by SCS to be in compliance with specific indoor air quality emission requirements. Meets or exceeds applicable ANSI/BIFMA standards. Arms are sold separately.