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The ABB 551511/23/4 octagon box extension ring provides an additional 15.8 cubic inches of space. Constructed from pre-galvanized steel with a drawn construction, this extension ring features 1/2 inch and 3/4 inch knockouts. It is UL E2969 certified and TSCA Section 6(h) compliant.
The ABB octagon box extension ring is made of steel and provides 15.8 cubic inches of space for electrical connections.
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