Selmer Trumpet/Trombone Mouthpiece VisualizerSku #462494000000000 Selmer 462494 INI Breathing & Practice Aids for Brass https://www.esnapw.com/rses/ESnapServlet?MerchantNumberSent=63655
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This student aid tool shows at a glance when the mouthpiece is too high or low on the lips, whether the lower jaw recedes, whether the tongue protrudes during the attack, and many other embouchure faults. Accommodates a trombone on one end and a trumpet on the other.