Compatible with: Amplivox Amplivox 240, Amplivox Amplivox 260, Amplivox Amplivox 270, GSI TympStar Pro, GSI GSI18, GSI Pello, GSI AudioStar Pro, Interacoustics TITAN Firmware & Software (IMP440), Interacoustics Titan hardware improvements (probe/SB), Interacoustics AA222 with insert headphones

This 2 piece package of 50 ohm sound tubes can be used to replace the brittle or perforated front tubes of your EARTONE 3A Insert Earphones.