<ul><li>To account for the different sizes of ear canals, four click sleeve sizes XS, S, M and L are offered.</li><li>To take different amplification needs into account, all four sizes are available in both closed and vented versions.</li><li>In the closed version, used for higher amplification needs, a small vent of 0.8mm diameter and 4mm length realizes an equivalent vent size of 1.6mm diameter and 16mm length.</li><li>In the vented types, two short openings are incorporated on both sides, providing an equivalent vent size of 16mm length and >4mm diameter.</li><li>"In addition, turn protection and side indication provide an extraordinary wearing comfort."</li></ul><br><br>

FCS Pack of 6 Click Sleeve for Siemens Signia, A&M, audibene, Audio Service, HearUSA, REXTON, TruHearing RIC and Instant Fit Click CIC/ITC Hearing Instrument. (Closed, Large)