Blue Mule Brush Foam-All is a foam cleaning system that continually creates foam through a high quality brush. This venturi injection system draws chemical concentrate from any sized container, mixes it with water and projects the accurately diluted solution through the 50′ hose and 44″ handle as a wet, clinging foam. Mount the Brush Foam-All anywhere 50-125 PSI water is available. Foam continually flushes debris from the bristles. Available with a soft or stiff bristle brush. The soft bristled “easy” brush is suitable for use on paintwork and other delicate surfaces. The stiff bristled “rough” brush should not be used on paintwork or other delicate surfaces.