The 1816 splice is perfectly designed with the contractor in mind, for those who work with irrigation systems, installations, or underground dog fence systems. This splice holds two 12-gauge wires, two 14-gauge wires, four 16-gauge wires, and a multitude of 18-gauge wires. It is filled with our synthetic dielectric, non-corrosive, Food and Drug Administration approved, waterproof 88 gel.