The Volcano Vaporizer Air Filter Cap functions as a highly sturdy cover for vaporization devices. It's a handcrafted OEM (Original Equipment Manufacturer) spare part that was made solely for use with Volcano units. This user-friendly cap works to make sure air filters stay in their designated locations at all times. It can be extremely beneficial for vapers who wish to reduce vent balloon fill times. It can also be beneficial for strong airflow needs.