56 890 Pre-Galvanized Steel Flat Concrete Ring Back Plate 4-1/2-Inch x 0.3-Inch

56 Flat concrete round ring back plate is suitable to use with masonry box. It features 0.062-Inch steel construction and has pre-galvanized finish. It measures 4-1/2-Inch OD x 0.3-Inch. Back plate is UL listed, CSA certified and meets NEMA/ANSI standards.