Specification :

Octagonal Outlet Boxes

Octagon outlet boxes are named for their shape and are typically ceiling mounted to wire lighting fixtures. Extension rings provide a means for adding additional cubic capacity or as an outlet box for surface conduit. Boxes may be used in the installation of lighting fixtures. Combination screw heads provide for faster installation.
Size:
4" x 1-1/ 4" 12.5 cu. in. interior
4" x 1-1/ 2" 15.5 cu. in. interior
4" x 2-1/ 8" 21.5 cu. in. interior