ReceptXtenders 1/2 in. 1-Gang Electrical Receptacle Box Extension Ring 00004
Sigma Engineered Solutions Weatherproof Extension Ring 1-Gang Gray Metal Weatherproof New Work Standard Box Extender Exterior Electrical Box in the Electrical Boxes department at Lowes.com
Gangable Box Extenders (2-Pack) at Menards®
Arlington BE1-2 Electrical Outlet Box Extender, 1-Gang, White, 2-Pack, Used for extending electrical boxes up to 1-1/2-inches - Walmart.com
How to Add an Outlet Extender - Pretty Handy Girl
3/4" ReceptXtenders Single Gang, Receptacle Outlet Box Extender (1 pc.) with screws UL Listed, Mud Ring - Walmart.com
Steel City 2-Gang 4 in. 21 cu. in. New Work Metal Square Electrical Box Extension Ring (Case of 20) 531511234-20R
Arlington Industries Box Extender 2-pack BE1-2
Electrical Receptacle Box Extender 1/4" Single Gang - - Amazon.com
Box Extender/Insulator
BES1 | Single | Gang | Box | Extender | Adds | 5/8"
How to Use an Electrical Box Extender
1-Gang EZ BOX Old Work Box Extender - CANTEX PVC Pipe and Fittings