19304 Titan 3 Way Composite Coupler Universal Style Accepts A Style: ARO 210 style, M Style: Milton or Industrial style, T Style: Tru-Flate / Parker Automotive style. 3-Way Composite Coupler - Female: This coupler will accept the three most popular nipple styles, it is light and durable with nylon construction and can has a maximum working pressure of 210 PSI.