Hearing Aid Filters for Phonak Cerushield, Portable Disk Wax Guards Black Compatible with Phonak Marvel & Phonak Paradise. Please note that our product is not sponsored or endorsed by, or affiliated with the brands it fits, including Phonak. Premium Material: The roulette storage box is made of high-quality ABS material, which is strong and durable. The ear wax guard is firm and stable, helping to extend the service life of the hearing aid for long-term use. Excellent Design: The roulette storage design is convenient to use. Simply place your finger on the textured line and rotate gently in the direction of the arrow to dispense the hearing aid filter. Effectively prevents earwax and debris from clogging the hearing aid receiver, keeping your device in optimal working condition. Essential Accessories: This hearing aid filter is compact and lightweight, easy to carry. Can be conveniently stored in a pocket or bag, making it suitable for daily use, shopping, or travel. A practical accessory for hearing aid users. Compatible Models: Designed for use with Phonak Marvel and Phonak Paradise hearing aids equipped with SDS 4.0 receivers. Not compatible with older hearing aid models or receivers manufactured before November 2018. Please verify your device model before purchase.