FeaturesBallasts are CBM/ETL class P and are positively secured by mounting bolts|Pressure lock lamp holders|Suitable for damp locations|Lighting grade, baked white enamel finish|Multi-stage, iron phosphate pretreatment ensures maximum bonding and rust inhibition|Positive spring loaded, self locking, steel latches|Safety lock T-hinges allow hinging and latching from either side|Die formed of low iridescent, vertical grain anodized aluminum and anodic oxide coating louver|Accurate precision parabolic cells are held in place with interlocking feature|True-cut mitered corners|Black reveal with integral mechanical light seal around entire perimeter of louver|Louver protected from construction contaminants by polyethylene cover|3 in louver depth|Blank side/floating louver non-air supply|Silver finish louver|3 rows of 6, 18 cells