Masonry Box, Gangable, 3-3/4-Inch Length, 1-15/16-Inch Width, 2-1/2-Inch Depth, 15 Cubic-Inch Capacity, (2) (1/2-Inch - 3/4-Inch) Eccentric Conduit Bottom, (4) (1/2-Inch - 3/4-Inch) Eccentric Conduit Sides, (4) (1/2-Inch - 3/4-Inch) Eccentric Conduit Ends Knockout Size, Hot Rolled ASTM G-60-U, AISI C-1008 0.062-Inch Steel Material, Galvanized Finish, For Use With Conduit, UL 514-A, CSA Approval, Federal Specification W-J-800 Applicable Standard.