2-1/8 in D, 4-11/16 in Welded Junction Boxes with (6) 1/2 in and (6) 1/2 to 3/4 in side knockouts and (2) 1/2 in and (2) 3/4 in bottom knockouts are larger boxes that are installed when larger sized conductors are required. These boxes are great for industrial applications. Garvin Industries 2-1/8 in D, boxes provide extra volume for wiring and devices. GARVIN®, 72171-SW, Junction Box, (12) Side, (4) Bottom Knockouts, (2) 1/2 ,(10) 1/2 to 3/4 Side, (1) 1/2 ,(3) 1/2 to 3/4 Bottom in Knockout, Square Shape, Steel, Zinc Plated, 4-11/16 in H x 4-11/16 in W x 2-1/8 in D Dimensions