Custom BT#1.25 Trombone Mouthpiece
Inner diameter: 1.116" or 28.346mm
Bore Size: Standard - .295" or 7.493mm, Symphonic - .302" or 7.671mm
Cup Depth: 1.450" or 36.830mm
This is a very large mouthpiece in every way.The BT#1.25 is available on both the heavy or light weight blank style. The extra mass really helps to lock down the core of the sound and helps to slot the pitch.