The BU-7031-B-* is a test lead with dual stackable, 4mm banana plugs to mini-alligator clips The banana plugs mate with any standard 4mm banana jacks and are spaced at the industry standard .75" (19mm). Constructed with RG58/U Coax cable. Center conductor is 20 AWG (19x33) tinned copper and the shield is tinned copper braid (95% coverage). The overmold material is polypropylene. Alligator clips are nickel plated steel with PVC Insulators.