What is a pneumatic gas cylinder in a conference chair?

A pneumatic gas cylinder is the adjustable-height mechanism inside the five-star chair base that allows seat height to be raised and lowered. It uses compressed nitrogen gas and a mechanical valve triggered by a lever under the seat. Cylinders can be replaced when they fail (the chair sinks when sat on). At OfficeFurniture2go.com, replacement cylinders are available for all conference chair lines we carry — call 1-800-460-0858 for parts support.