McCallum B Flat Extenders

McCallum B flat extenders  - Add these small extensions to the top of your drones and this will allow you to tune them easily to B Flat (466Hz) without the need for special reeds. Made to fit a 14.5mm drone bush with the addition of a little plumbers tape they can be used on a wide variety of pipes. Depending upon your set up you may have to open the drone reed bridles a fraction to compensate for the change in drone operating pressure but once set you can quickly change from concert pitch to todays pitch with the minimum of fuss. Comes as a Set of 3 - 1 Bass, 2 tenors