This Valve Brush is at a 45° angle.  It features a drip tube and (2) 1/8” female NPT inlets.  A pipe 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 1/2”–20 threaded shank can be secured to a mounting bracket using the plated steel nut and washer.  The bristles are nylon (stainless steel is also available, part no. B1008-SR2BHW)

The shank is adjustable to accommodate up to 1/2” of bristle wear.A replacement brush is readily available.