This hydraulic quick connector set is a perfect replacement for your worn-out couplers. The set includes two female NPT sockets and two male NPT plugs, both made of high-quality carbon steel material. The 1" body size and 1" NPT thread size ensure a snug fit for your pipe. With a burst rating of 14,500 PSI, these couplers are designed to withstand high-pressure environments. The plug end diameter is 1" and the socket end diameter is also 1". The set is compatible with pipes that have a flow rate of 12 GPM-24GPM. New no box. Ships USPS parcel select.