FEMALE: 1×40 Pin 2.54mm Straight Long Female Strip Connector is a 40 pins single row female connector/header. It can be cut into any desired sizes with the wire cutter. The pitch for this header is 2.54mm. MALE: Male header pin is a type of electrical connector consists of rows of the male connector. The pins are inserted to PCB or other board to prevent damage of wires and cables which con not directly soldered on PCB.