Genuine Phonak / Unitron receivers as supplied by Phonak & Unitron Brand New Unused These items use the CERUSHIELD DISCS These are 3 pin receivers for Phonak & Unitron Hearing Devices. Compatible with the Phonak Paradise (P) series and Marvel (M) series hearing aids. Model: SDS 4.0 RIC M receivers, size 3Available in left (blue) and right (red) versions. Sealed boxes as shown in the photo. I always kept spares, but my new hearing aids use a different fitting.
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