Weatherproof Enclosure Finish Painted Enamel Duct Mounting Depth (In.) 4 1/4 in Height (In.) 12 in Length (In.) 12 in Width (In.) 4 1/4 in Standards CSFM CUL UL Includes (4) Screws Gasket Installation Instructions WP-1 Weatherproof Enclosure For Use With SM Series Smoke Detectors