Having an assortment of connectors is very useful when building projects. This breadboard pitch 2.54mm Dupont Male / Female connector kit includes 620 pcs in some of the most commonly used sizes. In the kit are 1 x 1p, 1 x 2p, 1 x 3p, 1 x 4p, 1 x 5p, 1 x 6p, 2 x 2p, 2 x 3p, 2 x 4p, 2 x 5p, and 2 x 6p connectors along with 400 crimp pins (200 male / 200 female). All of these components are packed inside a nice case, making it easy to pack around and keep track of everything in the kit.