Heavy duty industrial grade rubber air hose. Heavy gauge all steel reel assembly. 8-position ratchet gearing locks reel at desired hose length. Features auto rewind, spring-powered automatic recoil. Mount reel on ceiling, wall, or floor - wherever it is most convenient. Air Hose size: 3/8" x 50' Air Inlet to Reel (F): 1/4" NPT Hose Connectors (M): 1/4" NPT Max. Capacity: 300 PSI Max Air FLow: 25 CFM