AR Resonance Trombone Mouthpiece Backbores - New

Brand new AR Resonance trombone backbores, made in Italy. Tops sold separately.

Small Shank Tenor
60 S (6.0mm throat, small taper) -  more resistance
60 M (6.0mm throat, medium taper) - slightly less resistance
60 L (6.0mm throat, large taper) - most free-blowing

Large Shank Tenor
1L 72 - large shank tenor mouthpiece with very open feel and sound with good slotting
2L 72 - large shank tenor mouthpiece, almost as open sound as 1L 72 but more centered feel

Bass Trombone (large shank)
GR1 80 - all-around bass trombone backbore
2L 80 - all around bass trombone backbore with a little more focus