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Steel City 53151-1/2-3/4 4 x1-1/2 Inch Steel Square Extension Ring with 1/2 and 3/4 Inch Knockouts | Cooper Electric
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RACO 2-Gang Steel New Work/Old Work Box Extender Electrical Box in the Electrical Boxes department at Lowes.com
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Southwire 4 in W x 1-1/2 in. D Steel Metallic Octagon Extension Ring with Two 1/2 in. KO's and Two 3/4 in. KO's 55151-S-UPC - The Home Depot
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Hubbell-Raco 207 :: 4" Square Extension Ring, 2-1/8" Deep, Welded, Metallic :: PLATT ELECTRIC SUPPLY
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Steel City 531511234UB 4" Square Extension Ring, 1-1/2" Deep, 1/2" & 3/4" Knockouts, 21.0"° | Cooper Electric
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Steel City 53151 1/2 3/4 Pre-Galvanized Steel Square Box Extension Ring with 1/2-Inch and 3/4-Inch Knockouts - Ring Terminals - Amazon.com
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Steel City 4-11/16 in. 2-Gang New Work Square Metal Electrical Box Extension Ring 73151 1/2 3/4 - The Home Depot
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Appleton 4SSBESPL :: 4" Square Extension Ring, 1-1/2" Deep, Welded, Metallic :: PLATT ELECTRIC SUPPLY
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Commercial Electric 1-Gang Metallic Weatherproof Extension Ring with (4) 1/2 in. Holes, Gray WSE450G - The Home Depot
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Commercial Electric 4 in. Round Metallic Weatherproof Extension Ring with (4) 1/2 in. Holes, Gray WRE450G - The Home Depot
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