BELL PRCF57550WH Ceiling Fan Electrical Box, White - Amazon.com
RACO 1-Gang Galvanized Steel Old Work Round Electrical Box in the Electrical Boxes department at Lowes.com
How to Retrofit a Ceiling Fan Electrical Box - Fine Homebuilding
Commercial Electric 4 in. Round 1-1/2 in. Deep 15.3 cu. in. Metallic Ceiling Fan/Light Fixture Box and Brace Kit for New Work CMB150-NB - The Home Depot
RACO: 294 Ceiling Fan Box - YouTube
Can ceiling light mount box be used to attach ceiling fan? - Home Improvement Stack Exchange
Carlon SuperBlue 4 In. Nail On Ceiling Fan Box - S.W. Collins
926 Ceiling Fan Box w/Brace, 1-1/2-inch Deep Octagon box, for Ne.-Ceiling fan brace-Ceiling fan support-Ceiling fan box-Ceiling fan mounting - Walmart.com