The RMR Enclosure Threaded Drain Plug Kit prevents accumulation of condensed water by allowing it to drain out the bottom of the enclosure. The drain plugs also vent air out of the enclosures, helping to equalize air pressure. 

RMR Enclosure XL Polyvent Protective Vent Kit provides ventilation and equalizes air pressure in the event of drastic temperature changes. Pressure equalization is essential to protect the enclosure seal from damage. Installation hardware included.