Comes with dowty washer and male foster fill. Dowty washers help provide a seal fit without too much torque. Having male foster fill helps provide quick disconnect solutions, you must have the female foster fill on the end of the hand pump hose or filling end of your scuba or scba tank rigs. If you do not have the female foster fill on the end of your hand pump or scuba tank hose you can directly attach the adapter without the male foster. Not sure about how you connect the coupling fittings, kindly contact us and we shall be happy to help. Made from high grade steel. Corrosion free and tested to higher fill pressures. (300 BAR)
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