This heavy-duty 100 ft. Lighted cgm extension cord was designed to resist heat and corrosion with its durable nickel-coated blades and contacts. Built to last, the cord features over-sized strain reliefs and pre-molds that help prevent the ends from pulling away from the jackets. The cold weather PVC insulation and casing offer the flexibility to work in temperatures as low to -40°f while this extension cord"s molded-on lock provides an added layer protection with water-resistance.