30 Piece Set of Reinforced Breadboard Jumper Wire Male to Male Includes the following color-coded sizes: 6 pieces of 3-inch (Blue) 6 pieces of 4-inch (Yellow) 6 pieces of 5-inch (White) 6 pieces of 6-inch (Black) 6 pieces of 7-inch (Red) Great for prototyping on a solderless breadboard, or building circuits on your microcontroller's protoboard