Economy Self-Contained Deluxe Water System w/750 ml Bottle & Extra Bottle Deluxe models have a selector toggle allowing you to switch between city & bottled water 750 ml & 2 liter heavy duty bottles available Comes with 2 x 750 ml Standard 28mm thread water bottles Gauge 7260 shows bottle pressure Bracket mounts to any flat vertical surface Optional post-mount available On/off toggle releases bottle pressure