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4'' Square Electrical Box, Ten 1/2'' and Six TKO Knockouts, Welded Construction, 30.3 Cu. in. Capacity, 2-1/8'' Deep, Raised Ground, Combination Screw Heads, Galvanized Steel - Amazon.com
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Evolution Series EFB6 Floor Box Knockout Plate | Raised Floor Boxes | Floor Boxes | Wire and Cable Management
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Junction Box with Knockouts – Leading distributor of electrical wiring connection and protection systems | Cable Connector & Protection Products in India | Controlwell.com
![Wanting to go thru knockout in back of box to add outlet on other side of wall, how do I wire that in? : r/AskElectricians Wanting to go thru knockout in back of box to add outlet on other side of wall, how do I wire that in? : r/AskElectricians](https://preview.redd.it/wanting-to-go-thru-knockout-in-back-of-box-to-add-outlet-on-v0-4z2ah5i4gfqa1.jpg?auto=webp&s=7b91db51213b8aa499e664a61fd8646f1a12d3ec)