McCallum Poly B Flat CEOL Pipe Chanter
McCallum Ceol B Flat Polypenco Pipe Chanter
McCallum's Bb pipe chanter is pitched to 466 Hz, concert pitch Bb, so it can be played with other instruments in the key of Bb. You will likely need drone reed extenders, McCallum drone extenders (for McCallum pipes), or low-pitch drone reeds to bring the drones in line with the chanter.
An improved version of the McCallum Polypenco B-flat pipe chanter