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
314.27(C) Boxes at Ceiling-Suspended (Paddle) Fan Outlets.
RACO: 294 Ceiling Fan Box - YouTube
Hubbell Wiring Part # 294-1 - Hubbell Wiring Ceiling Fan Box 4 In. Octagon 2-1/8 In. Deep Fa Bracket - Electrical Boxes - Home Depot Pro
Bell and Howell Socket Ceiling Ceiling Fan with White Finish, Light Adjustable Ceiling Light 1000 Lumens, 4 blades - Walmart.com
Hubbell-Raco 296 1-1/2-Inch Deep 1/2-Inch Side Knockouts 4-Inch Octagon Ceiling Fan Support Box - Electrical Boxes - Amazon.com
RACO 4" Steel Round Ceiling Fan/Fixture Electrical Box at Menards®
Thomas & Betts 54151CFB Steel City Ceiling Fan Box | Standard Electric Supply Co.
RACO 1-Gang Steel New Work Standard Ceiling Fan Electrical Box, Gray