< ul >< li > Cerustop Wax Guards 2 x 8 Packs ( 16 Units )< li > 2 x 8 packs ( 16 units )< br >< div > < p > < span > Suitable for most Widex , Phonak and Unitron hearing aids ; Prevents loss in performance due to wax build up . 16 black sticks with white filter .