There is a wide range of different wax guards used by hearing aid manufacturers so it is is really important to use the correct ones for your hearing aids - never guess and just because the pack looks familiar it does not necessarily means they are the type you are looking for!
3NANOCARE
Widex Hearing aid NanoCare Cerustop wax guards - pack of 8...
3CERUSTOPX
Hearing aid CeruSTOP XL wax guards - pack of 8
3PCERUSTOP
Cerustop white wax guard 8 pack
MXPH020
Blister of 1 CR2032 Philips Lithium Coin Cell Battery