The Iberville 4-inch steel electrical box extension is built for professional electricians and contractors who need reliable, code-compliant solutions on the job site. Whether you're extending a flush-mounted box to accommodate thicker drywall, tile, or panelling, this single-outlet steel extension delivers the cubic capacity and knockout flexibility to get the job done right. Rated to CSA 5043 standards and constructed from durable silver-finish steel, it's a dependable choice for residential and light commercial rough-in work where precision and compliance matter.

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