This Valve Brush features (2) 1/4” OD tube inlets.  An end plug installed in one of the inlets can be removed to connect brushes in a series.  An adjustable precision needle valve controls the flow rate; it has a friction lock to guard against loosening from vibration.  The holder has (2) 7/32" dia mounting holes.  The bristles are stainless steel (nylon is also available, part no. B309-1X00).   The total width of the brush is 2 1/4” and total height of is 4 15/16”.

The shank is adjustable to accommodate up to 1/2” of bristle wear.  A replacement brush that slides into the holder is readily available, part no. B579-3.