This 2x20 "tall" header gives your board the ability to increase the GPIO heights to make room for enclosures or other components that can enclose your Pi. It has the same number of pins and pin spacing as a Raspberry Pi. With 40 0.1"-spaced pins, this through-hole header is easy to install and requires little soldering to a suitable "shield." Included in the kit is one Raspberry Pi GPIO Tall Header, two by twenty documents, and a dimensional drawing.