The Blue Mule Easy Brush Low Volume Ultimate Wash System is a foam and rinse station with multiple attachments. This venturi injection system draws chemical concentrate from any sized container, mixes it with water and projects the accurately diluted solution as wet clinging foam through a brush foamer, or an adjustable foam nozzle. Remove the quick connect foam brush or nozzle and adjust the ball valves to rinse using a spray gun. Mount anywhere 50-125 PSI water is available. Foam continually flushes debris from the bristles. Great for jobs that require scrubbing with a soft touch. The soft bristled brush is suitable for use on paintwork and other delicate surfaces.