Metallic

 Hubbell Electrical / RACO 945 Electrical Box; 2-1/2 Inch Length x 4.500 Inch Width x 14.060 Inch Depth, Galvanized Steel, Silver  

 Hubbell Electrical / RACO 941 2-Gang Box; 6-13/16 Inch Width x 2.500 Inch Depth x 4.500 Inch Height, Steel, 70 Cubic-Inch, 17-Knockouts  

 Hubbell Electrical / RACO 686 3-Gang Masonry Box With Stud Bracket; 5-9/16 Inch Width x 2.500 Inch Depth x 3.750 Inch Height, Steel, 47.80 Cubic-Inch, 11-Knockouts