Weatherproof Gaskets for Outdoor Electrical Connections. (5 pack) (5 Pack) - Keeps rain on extension cords from causing a short and tripping GFCI outlets. Great for Christmas lights, outdoor pumps, generators, landscape lighting, pond pumps, water fountains, air compressors, electric fences, pool pumps, pool heaters, and more. 100% Made in the USA. Good for up to 500 F and down to -40 F. Extremely easy to use.