Alligator to Test Pin lead set includes 1 red and 1 black cable. Each lead measures 24 inches in length. Alligator clips are crimped and soldered to the leads for greater reliability. These leads are perfect for prototyping with solderless breadboards. Outer diameter of cord: 2.5mm Material of cord: 22 * 0.12mm tinned copper Size of alligator clips: 27mm