Red, 2-1/8" deep, 4-11/16" junction boxes with (6) 1/2" & (6) 1/2"-3/4"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 painted red to easily distinguish them as fire alarm circuits. These boxes are great for industrial applications. Garvin Industries’ 2-1/8” deep boxes provide extra volume for wiring and devices.