4 Inch Octagon Box, Welded, Steel, Depth 2-1/8 Inch, Side Knockouts (2) 1/2 & (2) 3/4 Inch, Bottom Knockouts (3) 1/2 & (2) 3/4 Inch. Cubic Inches 21.500
- Knockout Diameter: 1/2 in
- Knockout Diameter: 3/4 in
- Mounting: Screw On
- Material: Steel
- Depth: 2 1/8 in
- Mounting: Nail On
- Diameter: 4 in
- Cubic Inches: 21.500 in³
- Number of Knockouts: 9
- Knockouts: Yes