A Red Dot Close-Up Plug is an essential electrical fitting used to seal unused threaded hubs or knockout openings in weatherproof metallic boxes, extension rings, and conduit systems. These plugs are designed to maintain the integrity and safety of the electrical enclosure by providing a reliable, weather-resistant seal against moisture, dirt, and debris in dry, damp, and wet locations. They are constructed from durable zinc, ensuring long-lasting performance and compliance with relevant electrical codes for both indoor and outdoor installations