Hubbell-Raco 8201 1-1/2-Inch Deep Square Extension with 1/2-Inch Side Knockouts, 4-Inch

Raco 8201 Square Extension Ring, Drawn, 4", 1-1/2" Deep with Twelve 1/2" KO"s, Gray

Airmont Products AP-12094, 4" Square Double Decora Switch Electrical Box Cover, 1/2" Raised, Exposed Work, Galvanized Steel, Crushed Corners, 2-Gang