56 273 Pre-Galvanized Steel Welded Concrete Ring 4-Inch x 4-Inch x 3-1/2-Inch 43-Cubic-Inch

56 Welded concrete ring is suitable to use with masonry box. It features 0.062-Inch steel construction and has pre-galvanized finish. It measures 4-Inch x 4-Inch x 3-1/2-Inch. Concrete square ring with four knockouts, includes 1/2-Inch and 3/4-Inch double row knockouts. Flat sides offer excellent contact for locknuts. Concrete ring is UL listed and CSA certified.