Summit 1 Wet-Line / Wing Nut Couplers are designed for industrial applications that require couplings to be connected and disconnected under pressure with little to no fluid loss. Wet-line couplers are commonly used on live bed / dump trailer wet-line hydraulic systems and other heavy duty applications. Applications: Dump Trailers, Live Bed Trailers, Mobile Drilling Rigs, Sand and salt spreaders, Oil Well Equipment, Heavy Equipment. This 1 female coupler connects to its male equivalent . Features: Brass body coupler and nipple prevents corrosion, Heavy-duty steel sleeve and wing nut, Nitrile seal with Teflon backup, 3000 PSI working pressure rating, 1 NPT Female Pipe Thread. Nominal Flow Rate: 55 GPM. What's Included: Female Coupler