You can work with all kinds of colors when you use the Rainbow Designer Wire Blend. Each tube contains 20 lengths of colored wire, all measuring five and three quarters of an inch long. The exclusive blend has been hand-picked by Kristal Wick and features all of the bright colors of the rainbow, including red, yellow, green, blue, purple, orange and pink. The colors have already been picked for you, so you can use them together in color-coordinated designs. This 18 gauge wire is sturdy enough to be used in structural designs and also works well for jump rings, wire wraps and more.