Overview Reviews Product Description Pressure switch controlled air manifold systems specially designed to suit ARB Air Locker(TM) (TM) equipped vehicles. Product Videos Custom Field EPA N/A MPN 180901 Product Reviews Write a Review Write a Review × ARB ARB Pressure Switch 1/4Npt Opn150-Cls13 - 180901 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *