Features:1. Waterproof and oil-resistant filter, can prolong the life of your hearing device by preventing earwax, dust and other foreign matter blocking the horn2. Made of quality material, which ensures durability of long time use.3. Mini size, professional for Siemens W-best Rexton hair aid use.4. Easy to install, make sure the older or other groups at ease.5. 2 colors to choose, meeting different demands.Specification:Item Type: Hearing Aid AccessoriesMaterial: PlasticBar Color: Random ColorItem Weight: Approx.10gFunction: Earwax GuardHow to use:1.Use screen changer to take out old filter.2.Clean the edge of the horn on the hearing aid.3.Use the other end to stick a new filter.4.Install a new filter and make sure it firm.Package Include:1* Earwax Filter Note:1.Please confirm the filter installed firmly, preventing it from being trapped in auditory meatus.2.Replace the earwax filter according to the circumstances after using every six months or one year.3.Use brush to clean the earwax filter frequently.