Thru-Wall Box for Concrete Block - 24 Cubic Inches - 3-11/16 L x 2-1/8 W x 3-1/2 D - 1/2 Inch and 3/4 Inch Concentric Knockouts - Galvanized Steel.
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CBTW 4ABBThru-Wall Box for Concrete Block - 24 Cubic Inches - 3-11/16 L x 2-1/8 W x 3-1/2 D - 1/2 Inch and 3/4 Inch Concentric Knockouts - Galvanized Steel.