It is an embouchure visualiser. See photos for sizes.
BACH embouchure Visualizer practice for rim [1825] Tron for bones
Flute Mouthpiece Exerciser, Metal Embouchure Trainer with Removable Rubber Ring, Embouchure Training Device, Lip Muscle Builder for Trumpet Trombone Saxophone
Embouchure Training Device,Embouchure Training Device Alloy Steel Mouth Strength Trainer for Trumpet Trombone Saxophone Clarinet Horn
Embouchure Training Device Mouthpiece, Brass Embouchure Trainer for Trumpet Trombone Horn Flute Clarinet Oboe Bassoon, Lip Muscle Strength Builder with Removable Rubber Rings
MUNEFE Embouchure Training Device, Embouchure Trainer Lip Muscles Builder, Mouthpiece Mouth Strength Trainer for Trumpet Trombone Horn Organ
![BACH embouchure Visualizer practice for rim [1825] Tron for bones](https://images.buynet.work/thumb.php?i=358356250&s=240)
![BACH embouchure Visualizer practice for rim [1825] Tron for bones](https://images.buynet.work/thumb.php?i=370600381&s=240)
