This is a 4-pole stackable header that features a pitch of 2.54mm, which makes it compatible with a variety of electronic components. The total height of the header is 19mm, with the housing accounting for 8mm of that height. The pins themselves are 11mm in length and have a width of 0.62mm and a thickness of 0.64mm. The header is designed to be stacked with other compatible headers, allowing for easy expansion and customization of your electronic projects.