Applications: the direct filters are suitable for many hearing aids from WIDEX, RESOUND, AUDIO SERVICE, UNITRON, HANSATON and much more. Diameter: these white hearing aid filters have a diameter of 1.3 mm Filter change - the filters can be easily and smoothly changed thanks to the practical replacement tool (black replaceable pin). Compatibility: same size as Widex and Widex NanoCare filters (1.3 mm diameter) Better speech understanding - we recommend that you change your filters regularly every 1-2 months. Usually, a duller or quieter sound from the hearing aids indicates that a filter change is due. Packaging - a gray box always contains 8 individual filters. Each filter is mounted on a black replaceable pin Color: as shown Material: ABS Package contents: 1 box * Hearing aid accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowed measurement error is +/- 1-3 cm.