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Made in the USA The Female Coupling Will Only Connect to a Male 1 inch NPT or NPSH Compatible Nozzle - 1 inch NPSH only Hose Type - Polyester Single Jacket Color - White Liner - EPDM Rubber Approximate Width Laying Flat - 1 3/4 inches Service Pressure - 300 PSI UL Listed Applications Light Industrial Use Residential Use Forest firefighting Brush firefighting Wildland firefighting 1" Hose Male Couplings Inside diameter of a male coupling - 1 inch Outside diameter of a male NH / NST coupling - 1.375 inches (8 Threads per inch) Outside diameter a male NPSH or NPT coupling - 1.295 inches (11.5 Threads per inch) Connections The female side of a NH / NST coupling will only connect to a male NH / NST connection The male side of a NH / NST coupling will only connect to a female NH / NST connection The female side of a NPSH coupling will only connect to a male NPT pipe or a male NPSH connection The male side of a NPSH coupling will only connect to a female NPSH connection. It will NOT thread into a female NPT pipe. For example, a male NPSH coupling will NOT thread into a female metal or pvc pipe. FireHoseDirect is located in North Carolina. We're a firefighter owned and operated company since 2011.