Areas of use: the direct filters fit many hearing aids from the 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 easily changed thanks to the practical replacement tool (black interchangeable pin). Compatibility: same size as the Widex , and Widex NanoCare filters (1.3 mm diameter) Better language understanding - we recommend replacing your filters regularly every 1-2 months. Usually a duller or quieter sound of the hearing aids indicates that a filter change is pending. Pack - a grey box always contains 8 individual filters. Each filter is mounted on a black interchangeable pin Colour: 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1.Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 555 hours Hope you have a pleasant shopping experience!