Bud Air Vent IPV-1115
The Bud Industries IPV-1115 Vent is used to equalize internal and external temperature and pressure, and to prevent internal condensation in your enclosure. The vent comes with the housing, gasket, and locking nut. The vent requires a 2.5" hole in your enclosure. There are internal holes to mount a 60mm fan to the locking ring. This is the smaller version of the IPV-1116.
