In this world nothing can be said to be certain, except we need headers, headers, and more headers!
Each pack contains ten candy-colored 36-pin 0.1" pitch break-away male headers. These are a little extra special in that the plastic holding the pins together is made of colored plastic instead of classic black.
You get 2 of each color: red, yellow, white, green and blue
Breakaway headers are like the duct tape of electronics. They're great for connecting things together, soldering to perf-boards, sockets for wires or break-away header, etc. We go through these guys real fast, and thought that given how handy they are, we'd offer them in a pack of ten!
You can cut these down to different sizes fairly easily, simply break apart, or use diagonal cutters to cut in between pins.