Ceiling Fan Mounting Bracket with Adjustable Bar Hanger, 1-1/2'' Deep, 2 NMSC Clamps, 2 1/2'' Knockouts, Fits 16-24 Inch Joist Spaces, Ground Screw, Electrical Box for Light Fixtures - Amazon.com
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
Southwire Bracket Mount Retrofit 4 In. Ceiling Fan Box - Parker's Building Supply
Arlington FBRS415 - Steel Fan and Fixture Mounting Box
Arlington FBRS415-1 Steel Fan and Fixture Mounting Box with Adjustable Mounting Bracket, For New Construction, 16-24-inches, Metallic, 1-Pack - Electrical Boxes - Amazon.com
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
Hubbell-Raco 294 2-1/8-Inch Deep, 1/2-Inch Side Knockouts, Wood Joist Bracket 4-Inch Octagon Ceiling Fan Support Box Gray - Electrical Boxes - Amazon.com