Siemens, Costco, Rexton, Signia Medium Vented Click Sleeve - 6 Pack - USA Seller

Description

To account for the different sizes of ear canals, four click sleeve sizes XS, S, M, L are offered.
To take different amplification needs into account, all three sizes are available in both closed and vented versions.
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.
In the vented types, two short openings are incorporated on both sides, providing an equivalent vent size of 16mm length and >4mm diameter.
Pack of 6 Sleeves
Sleeve Color may be black or clear