3" deep, 4-11/16" junction boxes with (4) 1-1/4" side knockouts and (2) 1/2" & (2) 3/4" bottom knockouts are larger boxes that are installed when larger sized conductors are required. They are great for industrial applications. Garvin Industries’ 3” deep 4-11/16” boxes provide extra volume for wiring and devices. Red painted boxes are also available to easily distinguish fire alarm boxes.