Brass extension female x male thread (square inside)

Brass Extension Yellow M/F - (Square inside)

Brass extension piece male-female, it is a threaded fitting used to extend the length from the terminal point of water supply to the tap. It consists of a cylinder with male thread on one end and female thread in the other one of the same dimension. The most common application is to mount wall taps, in cases where the connection point is far from the point of tap installation.