Premium Material: Made of 1.5mm sturdy cold rolled steel, precision cut and welded to make it stronger and more wear-resistant, waterproof electrical box can keep your equipment well protected in harsh environments. The surface is polished and sprayed to prevent rust, rain and corrosion. Tight & Waterproof: Electrical junction box is sealed with a one-time molding foam thickening sealing strip, which can effectively prevent the entry of rainwater, dust and ultraviolet rays, and protect the internal circuit. The electric box reaches the waterproof level of IP66.