Hubbell 5456112 Concrete Box Ring 4 Inch, 42 Cu. In., 3-1/2 Inch Depth, Steel, 20-Pack

Designed for high-rise construction, this concrete box ring offers exceptional durability and functionality. Made from rugged steel, it features flat sides that ensure excellent contact for locknuts, while its external ears allow for secure nailing to wooden forms. The innovative design includes waxed fixture ears that prevent concrete from interfering with the threads, and a removable top cover for easy access before pouring. With a depth of 3.5 inches and a capacity of 42 cubic inches, this box is an essential component for any electrical installation in poured decks, providing reliable performance in demanding environments.