Item Type: Embouchure Training Device Material: Brass Size: Approx. 6.5 x 1.9 x 1.9cm / 2.6 x 0.75 x 0.75in (0.1 to 0.2cm Error in Manual Measurement) Usage: For Trumpet, Trombone, Horn, Organ, Flute, Clarinet, Oboe and Bassoon.1EXERCISE MUSCLE ENDURANCE: The Mouth strength trainer builds lip muscle endurance, practicing mouth strength and fixing mouth shape. 2EASY TO USE: Use both ends, pull one end to work on lip biting strength and lip muscle strength concentration. 3APPLICATION: Embouchure training device mouthpiece is suitable for trumpet, trombone, horn, organ, flute, clarinet, oboe and bassoon. 4BRASS MATERIAL: Trumpet mouthpiece is made of brass material, rustproof and long lasting, with a removable rubber rings for durability. 5LIGHTWEIGHT AND PORTABLE: Embouchure trainer is small in size and easy to carry, you can practice anytime and anywhere, and get a strong sound through easy blowing. 1 xEmbouchureTrainingDevice