The MK PRO low whistle is tunable. It has a tapered channel to maintain the required air flow and back pressure in balance. To couple the two pieces it has a well-fitted and adjusted brass barrel so that it slides easily. Ergonomic position of the holes.
Anodized for durability.
Includes a cloth case.
If you are going to play the following video on a mobile phone, it is preferable that you do it with headphones.
