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Hubbell Mason Box Single Gang 4 Concentric Knockouts 2-1/2 In. Deep | Manufacturer Part Number: 690 | Manufacturer: HUBBELL WIRING. Masonry boxes are designed to accommodate the mounting of switches or other devices in masonry walls.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.