Volt task chair offers a unique combination of style, scale, comfort and functionality. The larger seat and back provide maximum comfort, and the 360-degree swivel mechanism with tilt, tilt-lock and tilt tension options allow you to adapt the chair to your personal needs. Tilt tension controls the amount of resistance felt as you lean back, accommodating a variety of tasks and body types. Tilt lock keeps the chair in an upright position when necessary. Synchro-tilt allows seat and back to recline at different rates, supporting a more ergonomic posture. This ergonomic task seating design includes a mesh back, fully padded seat and 2-½" hooded, dual-wheel casters. Seat size is 19-¼" wide x 17-⅞" deep. Seat-to-floor height ranges from 17-¾" to 21-⅜". Back measures 18" wide x 18-¾" high from the seat. Chair also features a plastic outer back and black frame. Chair meets or exceeds applicable ANSI/BIFMA and ISTA performance standards. Height-adjustable arms are sold separately.