The BU-7020-B-XX-* is a test lead with dual stackable, 4mm banana plugs to Micro plungers. 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. Banana plugs are Nickel plated beryllium copper and brass.