The 5309A is a replacement DMM Test Lead Kit with probe body and banana plug. Probe body incorporates a two step mould process. The probe with Santoprene? rubber outer insulation, polypropylene fire retardant inner insulation, stainless steel tip, 18AWG tinned copper strand silicone insulation 0.144-inch outer diameter wire. The banana plug with nickel-plated brass body, nickel-plated beryllium copper spring, polypropylene insulation. Designed for DMM's with non-sheathed banana jacks. Probe body and banana plug are moulded directly to the wire for robust pull strength.