USA - UNIVERSAL TYPEP/NLΦDSWMTMaterialpackingJU12-2SM53Φ22191/4"NPTbrassbulkJU12-3SM54Φ22193/8"NPTbrassbulkJU12-4SM56Φ22211/2"NPTbrassbulkFEATURES:The 1/4 UNIVERSAL coupler will accept 1/4 INDUSTRIAL, 1/4 TRUFLATE, AND 1/4 ARO type plugs.sleeve guard protects against accidental dragged on the floor or over obstructionsdeep knurted socket sleeve for positive grippingAPPLICATIONS:general air servicepneumatic toolsCONSTRUCTION:socket body: steelbacknut: steelsleeve: steelvalve: steel or brasslocking balls and pins: steelseals: buna-N/Nitrile