Interior Panel, Steel Material, Galvanized Finish, For Use With NEMA 12, 4, 4X, Junction Box, Wall-Mount Enclosures, Sub-Category Panel and Panel Accessories, Application For Mounting Components, Height 21.00 In., Width 17.00 In., 12 Gauge This interior panel is designed to be installed inside enclosures to allow mounting of components. Panel mounting hardware is included.