Enclosure, Roof-Mount, Flashing Dimensions: 15.25" x 17.25", Cavity: Height 3”, 255 Cubic Inches. Includes: 8" DIN Rail, 2 Position Ground, 1/2", 3/4" & 1" K.O.'s., Material: Galvanized Steel. ETL listed and labeled to the UL50 3R Standard, Grey