Intermatic 2T2500GA Electrical Box, 5 1/2" x 9 3/8" x 3 3/4" Plastic Indoor/Outdoor Enclosure - Gray Type 3R Rated Made of heavy-duty industrial grade plastic Rainproof all-plastic enclosure is perfect for applications where high humidity and/or dust can be a problem Plastic enclosure has combination &frac12; - &frac34; inch nominal knockouts, one on back and on each side of enclosure, and two on the bottom