Electronic Supply by Industrial Electronics in Milwaukee Wisconsin : Potter Brumfield, Radio Shack Stores in Milwaukee: NEMA Box Accessories Air & Moisture Vents NEMA Box Accessories Air & Moisture Vents ================================================================================ synscon on 24/05/2016 09:41:00 Used to equalize internal and external temperature and pressure, and to prevent internal condensation. Design Features In small size two mounting styles available, New large size can be mounted with or without a cooling fan. All plastic construction Each vent comes with housing, gasket and locking nut. Large Air & Moisture Vents Catalog Number Fan Dia. (mm) (Not included) Weight/oz. IPV-1115 60 8 IPV-1116 80 10 NEW Large Air & Moisture Vents Catalog Number Fan Dia. (mm) (Not included) Weight/oz. IPV-1115 60 8 IPV-1116 80 10