4 Inch Octagon Ceiling Box with Bar Hanger, 2-1/8 Inch Deep, Side Knockouts: (4) 1/2 Inch, Bottom Knockouts: (3) 1/2 Inch, Total Span Length 24 Inch, Adjustable Length 8 - 16 Inch, Fan Weight 35 lbs, Fixture Weight 50 lbs, Steel
- Knockout Diameter: 1/2 in
- Mounting: Bracket
- Mounting: Screw On
- Depth: 2 1/8 in
- Mounting: Nail On
- Cubic Inches: 21.500 in³