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The Chromalow
The Chromalow is a chromatic low whistle with a
standard flute body and a machined Delrin mouthpiece.
The mouthpiece has the same design as my other low
whistles.  The price is C$350.  A standard flute
mouthpiece is available for an additional C$35.
I have put a few videos on YouTube.  Search for
O'Brien Chromalow.
Thumb rests are available for C$15 each.

Metal thumb rest.                                   Soft rubber thumb rest.                                 Metal and rubber thumb rests.
-attached with strong double                    -attached with nylon ties
sided tape