2-Gang Box Extender for Shallow Boxes
These box extenders can be installed over a shallow box which will allow you to install larger devices by adding 5/8" or 10.5 cubic inches to the existing box volume.
It is paintable. Comes with 4 installation screws.
To work with 3-Gang or larger boxes, you can purchase part #HW187-52. Each coupler will extend the box an additional gang.
Color is White.