Replacement Select-A-Vents are a quick and easy way to control low-frequency amplification when using custom-fit earpieces.
Each Select-A-Vent tree contains one of each vent size: #1 (.125ï¾”), #2 (.110ï¾”), #3 (.080ï¾”), #4 (.050ï¾”), #5 (.025ï¾”) and #6 (solid plug).