The UY2's two ports accept any two solid copper conductor combinations of 19-26 AWG (0.9 mm-0.4 mm) filled or air core cable with a maximum insulation O.D. of 0.082 inch (2.08 mm). The wires joined can be different wire gauges. Factory inserted sealant insulates the connections, protects against corrosion and seals out moisture. In addition, the UY2 is available in a dry version, the UY2-D.