Check the listing for details. Waterproof Electrical Connection Box Outdoor Weatherproof Extension Cord Box. Color: Black, Condition: New. Listed at 24.99 USD. Product Description Wide Compatibility 4 cable entry ports, which are great to protect power strips, string lights, Christmas holiday decorations and more outdoor electrical connections. Enough Space The waterproof extension cord cover works with 10A-16A gauge extension cord, as well as the braided wire. Watertight Space The weatherproof extension cord connection box 4 entry ports are filled with soft sponges. It can tightly wrap the cord and keep the box watertight. Simple Locking System Extension cord box weatherproof is easy to open and close the cover with pull and push the 2 locking latches and top lid. Great for indoor & outdoor applications The outdoor extension cord box is ideal for a wide range of outdoor applications including outdoor extension cord, lawn and garden power tools, Christmas holiday lighting, landscape decorations, pool pumps, fountains, fish ponds, patio heaters and more outdoor electrical connections.