Usage Tips:Compatible: Our GN wax guards fits most CIC, , ITE and RIC( or RIE) hearing aids for , for Unitron, for Widex and some from Resound, , it does not fit for Signia and for hearing aids GN Wax guards filter for hearing aids,protects the hearing aid from harmful particles,reducing the number of repairs and extending the lifespan of the hearing aid. Easy to use:The wax filter is easy to replace, and a tool for insertion and removal of the filter is included, ideal for elderly users or those with limited dexterity. Replace When Necessary: If your GN wax guards filter becomes clogged with earwax or debris, it can affect the performance of your hearing aid. In such cases, replace the wax filter promptly to maintain optimal sound quality. We recommend replacing the wax filter at least every 4 weeks. Regular Maintenance: To optimal hearing aid performance, it's essential to check and replace the GN Wax guards PN 20439700 filter regularly. Failure to do so may result in reduced sound quality and potential damage to the device. Color: White Material: plastic Package Contents: 5 * Hearing Aid Wax Guards 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.