NFPA cylinders conform to a set of specifications that makes them interchangeable regardless of the manufacturer.  The NFPA specifications include bore and rod diameter and mounting dimensions.  AVENTICS offers several series of pneumatic and hydraulic NFPA cylinders that are suitable for a variety of applications. NFPA tie-rod air cylinders are available in aluminum profile designs; pneumatic and hydraulic NFPA tie-rod cylinders are available in steel.