Steel City 1-Gang 4 in. 2-1/8 in. D New Work Metal Utility Box 5837112-25R - The Home Depot

Steel City 1-Gang 4 in. 2-1/8 in. D New Work Metal Utility Box 5837112-25R - The Home Depot

RACO 4 in. H x 2 in. W x 2-1/8 in. D Steel Gray 1-Gang Welded Handy Box with Eight 1/2 in. KO's and TS Bracket, 1-Pack 678 - The Home Depot

Steel City 4 in. Square Metal Box 1/2 in. and 3/4 in. Knockouts 521511234EW-50R - The Home Depot

Steel City - Electrical - The Home Depot

Steel City 4 in. 2 1/8 in. 2 1/8 in. 14.5 cu. in. New Work Handy/Utility Metal Electrical Box 3/4 in. Knockouts 1-Gang 58371.75 - The Home Depot

Steel City - The Home Depot

Steel City 4 in. 2-1/8 in. D Handy/Utility Box 5836112-50R - The Home Depot

Leviton C-Serie sMagnetic Stainless Steel 1-Gang Decora/Decora Plus/GFCI Wall Plate, Standard Size R50-0SL26-000 - The Home Depot

Steel City 1-Gang 3-1/2 in. New Work Metal Octagon Electrical Box (Case of 25) 2415112-25R - The Home Depot

pigtail plug boxes - maybe aka suspended receptacles