US D306088 S
FIG. 1 is a perspective view of a wall outlet box for a central vacuum cleaning system, showing my new design;
FIG. 2 is a right end elevational view thereof, the left end view being a mirror image;
FIG. 3 is a front elevational view thereof.
FIG. 4 is a top plan view thereof; and
FIG. 5 is a bottom plan view thereof.
The wall shown in broken lines in FIGS. 2, 4, and 5 is for illustrative purposes only and forms no part of the claimed design.