This is a pack of five 40-pin Double-Ended Single-Row Headers with 0.1" spacing. These headers are long on both sides (whereas standard headers are long on one side only), giving you the opportunity to connect two devices that have female headers, connect a device through another PCB, or simply to adapt a female header to male pins for easier prototyping and testing.

The headers are breakaway type and can be used to create any single-row header size from 1-40 pins. The pins are gold plated to assure good connection and to avoid oxidation.