Warburton A.T.V. Top #6
Warburton A.T.V. Advanced Training Visualizer, size 6, standard rim width, engages the full range of motion of your embouchure muscles (relaxed to full contraction). improves control and power of both breathing and buzzing, can be used with any Warburton trumpet or cornet backbore, or it can be used with it's own special solid ATV backbore, silver plated
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