If you have a central pressure and vacuum system in your building, select this option.  It provides a connection on the back side of your cabinet so you can connect from your wall outlets to the cabinet. The pressure hose uses a soft non-porous hose handle which makes it easy to hold the bottle and handle with one hand.  The vacuum hose has a replaceable nozzle with a dial to adjust the suction as well as easy to replace non-latex hose.