Reliable Compatibility: Wax guard filters work with various devices from Resound, Widex, Unitron, and others (not for ). Suitable for most CIC, ITE, and hearing aids for a hassle-free experience. Function: Prevents earwax, dust, oil, and moisture from clogging hearing aids, protecting them and extending their lifespan. Keeps hearing aids clean and ears healthy. Easy to Use: Simple to operate��remove the old filter with the removal end and install the new one. Important Notice: Do not use if you have a perforated eardrum. Regular replacement ensures consistent performance. Color: White and Black Material: Plastic Package Contents: 5 x Wax Guard Filters Only the listed items are included. Note: Slight color variations may occur due to lighting or display differences. Size tolerance: 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store