These hubs are designed to prevent water ingress into the safety switch enclosure. They typically include gaskets and are made from zinc or chrome-plated materials to resist corrosion. Water resistant hubs are field installed on NEMA Type 4/4X/5 stainless steel and NEMA Type 12/3R and 12K enclosures. This sealing capability ensures the switch remains operational and safe even in wet or humid environments. This Water Resistant Hubs with standard zinc hub has conduit size of 4 inches.