Thomas & Betts 53151-1/2&3/4 Pre-Galvanized Steel Drawn Extension Ring 4-Inch x 4-Inch x 1-1/2-Inch 21-Cubic-Inch Steel City

Thomas & Betts Steel City® Drawn extension ring is perfect for use with 4-Inch square steel outlet box. This 1-1/2-Inch deep extension ring features steel construction with pre-galvanized finish for longer endurance. It measures 4-Inch x 4-Inch x 1-1/2-Inch. Square extension ring with 1/2-Inch, 3/4-Inch knockouts, has capacity of 21-Cubic-Inch. Extension ring is UL listed.