4-Gang, Non-Gangable, Masonry Box, Welded, Metallic. Depth: 3-1/2". Side Knockouts:(20) 1/2" & 3/4" Concentric KOs. Bottom Knockouts: (4) 1/2" & 3/4" Concentric KOs. Cubic Inches: 15.5".
- Depth: 3 1/2 in
- Knockout Diameter: 1/2 in
- Knockout Diameter: 3/4 in
- Mounting: Screw On
- Material: Steel
- Gangs: 4
- Mounting: Nail On
- Cubic Inches: 15.500 in³