The Pressure Indicator promotes a compact design with multiple configurations to observe the presence of pressure. The Pressure Indicator lens displays clear in the absence of pressure and displays bright when activated at approximately 5 psi. Air Indicators are available with Red or Green Display and Black, White or Gray Panel Mount Bezel. The Panel Mount Pressure Indicator requires a .500 hole and is supplied with one Electroless Nickel Plated Panel Nut and lock washer.