Larger than standard NEMA panel used in same sized enclosure. 12gauge steel construction. Larger sizes have 2 or 4 formed flanges for added strength. Slotted corner design for easier mounting. Finished in white or unpainted galvanized. Specifications Finish : Galvanized Unpainted Series : EP Series Suitable For Use With : Eclipse Series Enclosures Length : 28.2 in Width : 58.2 in Material : Steel