The Personal Air Breathing Unit, will provide Grade "D" Breathable Air for a proper NIOSH approved respirator, and with the provided 54-inch tool air hose assembly, it will allow for a by pass of air for a paint spray gun. It is a 20 scfm system. This will allow for use with full hoods, equipped with vortex cooling tubes, if so desired. It works with the existing filter compressed air supply. The existing filter must provide air quality equal to that required for a flawless paint finish. The Punit is complete, belt-mounted system, with a built-in filter with filter monitor, and a carbon monoxide monitor with both audible and visual alarms. The monitor runs on a single battery, and continuously monitors the air for compliance with current OSHA standards. For more information visit www.breathingsystems.com.