The JoeBlow Sport with unique 2-stage design delivers both high pressure and high volume in record time. Stage one opens both barrels for huge volume, reaching 30 psi with 30% less effort than standard floor pumps. Stage two utilizes the small barrel for pressures up to 160 psi. Hammer type TwinHeadÔäó DX5 pump head with an extra-long and tangle-free hose makes it easy to reach valve stems. A durable steel barrel and large steel base provide extra stability.