These are .1 inch (2.54 mm) pitch headers; every workshop should have a good collection of these on hand. The 3×7 block is handy for use on analog inputs on the Bare Bones Board. The two extra rows can the provide power and ground rails needed in almost any analog sensing application. You can also use our handy 3-wire servo cables to run your signals. We purchase these headers in large quantities and make them available at a very decent price.
Sold singly or in bags of 10.