Carlon 1-Gang 9-3/4 cu. in. Old Work White Phenolic Surface Mount Electrical Box 5060 WHITE - The Home Depot
Mini Terminal Junction Box
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Arlington 8161PM Weatherproof Pole Mounting Box with base plate, White, 1-Pack - Electrical Boxes - Amazon.com
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Surface Mounting Box - Single Gang - Ivory | ShowMeCables.com
electrical - Can I side-mount metal box with holes in the back? - Home Improvement Stack Exchange
DJC Supply Co. 4" x 4" x 3" PVC Plastic Junction Conduit Box with Pre Molded 3/4" & 1/2" Conduit Holes, Easy to knock out covers, Metal screws - Amazon.com