Mr. Gasket Waterproof Relays are ideal for marine, off-road, dirt track or any other application that is exposed to muddy or wet conditions. Each pigtail harness has 7” long leads with heavy-duty 12 & 18 gauge wires molded in rubber and surrounded by a gasket for a leak-proof seal. Designed as a 12V universal application electrical harness, these relays are ideal for use on electric fuel pumps, water pumps, cooling fans, auxiliary lights or any other electrical accessory operating within the specified amperage.