4 x 1.5-Inch Steel Extension Ring
4" x 1-1/2" Deep, Square, Steel Extension Ring, 12 Each 1/2" Knockouts, 22-1/2 CUIN.
4" x 1-1/2" Deep, Square, Steel Extension Ring, 12 Each 1/2" Knockouts, 22-1/2 CUIN.