How does the height adjustment work on a pneumatic drafting chair?

A pneumatic drafting chair uses a gas-charged cylinder with a longer stroke than a standard office chair to reach a greater seat height range — pressing the paddle lever while seated releases the valve and body weight lowers the seat; pressing it while standing lets the spring-loaded gas push the seat up. Commercial cylinders are rated for 100,000+ adjustment cycles. FindOfficeFurniture.com's commercial drafting chairs use Class 4 cylinders rated for sustained heavy use — call 888-719-4960.