360 swivel and smooth rolling casters for sideward and upward mobility. Smooth-gliding casters let you roll wherever the workday takes you. 360-degree swivel provides freedom of movement in any direction. Tilt tension controls the rate and ease of recline. Tilt lock allows the user to lock out the tilt function. Hard casters roll quietly and effortlessly. Pneumatic seat height adjustment moves the seat up and down to adapt to various body heights. Add the optional HVL289 Arm Pack to add adjustable arms. Give your workspace a professional look on a reasonable budget with HON Network chairs. This collection of task chairs features cushioned, upholstered seats and backs that coordinate nicely with other HON products and virtually any existing aesthetic.