3-Gang Steel Box with 1/2 Inch and 3/4 Inch Knockouts - Dimensions Length 4-1/2 Inches x Width 8-5/8 Inches x Depth 1-5/8 Inches 3G1/23/4CN 3 GANG STEEL BOX 1/2" 3/4" KO'S
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Primary Spec Sheet
https://static.graybarcanada.com/Products/Rough-In Products/Rough In, Boxes, Covers/BOX3G1234CN/Files/BOX3G1234CN_Files.pdf
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Primary Spec Sheet
https://static.graybarcanada.com/Products/Rough-In%20Products/Rough%20In%2C%20Boxes%2C%20Covers/BOX3G1234CN/Files/BOX3G1234CN_Files.pdf