Raco Switch Box 12.5 Cu In 2-1/2 " D X 3 " X 2 " X 2-1/2 " 4 Side Knockouts 1/2 " Steel Bulk 2-1/2" deep 3" x 2" x 2-1/2" 12.5 cu. in. Capacity 4 side knockouts 1/2" 2 end knockouts 1/2" 2 back knockouts 1/2"