CMI WMB1305 .5" 3-Hole Single Gang WP Box. Weatherproof boxes and covers are crucial components in electrical systems, designed to protect electrical outlets, switches, and junctions from the harsh effects of weather and environmental conditions. These boxes and covers are constructed from durable materials like die-cast aluminum, PVC, or plastic, which are resistant to corrosion, UV radiation, and moisture, making them ideal for outdoor and wet locations. Weatherproof boxes are available in various sizes and configurations to accommodate different electrical devices and wiring needs, providing a secure and sealed enclosure to shield electrical connections from rain, snow, dust, and other outdoor elements.