4 pc Alligator Test Lead Set4 Piece set contains 1 of each Black, Red, Yellow and WhiteGood quality booted steel alligator clip with nickel plated finish.and a strong spring.16 Awg copper wire rated 600 volt max.Alligator clips are 2 inch long with 36 inches of copper wire between them.Color coded leads allow you to test circuits without crossing wires or causing shortsIdeal for charging batteries, electronic circuit prototyping or testing.SETL4-36