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    1. 53151 1234UB 4" x 1-1/2" x 4" 21Cu Inch 10Knockout Pre-Galvanized Welded Steel Square Outlet Box Extension Ring
      53151 1234UB 4" x 1-1/2" x 4" 21Cu Inch 10Knockout Pre-Galvanized Welded Steel Square Outlet Box Extension Ring
      $6.93 / EA
      Availability: 40 EA
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    2. 53151 3/4 4" x 1-1/2" x 4", 8-Knockout, 21 Cu Inch, Silver, Pre-Galvanized Steel, Square Box Extension Ring
      53151 3/4 4" x 1-1/2" x 4", 8-Knockout, 21 Cu Inch, Silver, Pre-Galvanized Steel, Square Box Extension Ring
      $2.72 / EA
      Availability: Currently out of stock
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