Shop › Cerustop wax guards - 1 pack Image 1 of 2 Image 2 of 2 Cerustop wax guards - 1 pack £4.25 Easy to use wax guards suitable for Phonak, Unitron, Widex and ReSound hearing aids. Quantity: Add To Cart Added! Easy to use wax guards suitable for Phonak, Unitron, Widex and ReSound hearing aids.