I’m looking for the phonak SDS 4.0 slim tubes in the size 00L and 00R, when I can find them they are in big bulk packages and very expensive. I am in the USA and everywhere I can find the tubes they are in the UK.
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A quick look on eBay and there are a number of the size and sides you are looking for.
I didn’t try Amazon, they are probably available there too.
Good luck
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