Adjustable jaws are compatible with most brass instruments, such as trumpet, trombone, euphonium, baritone, tuba, horn. Made of aluminum and steel, with anodic oxidation, durable and beautiful. Professional mouthpiece puller, perfect design, beautiful colors, portable, light weight, easy to use. and gift for any brass-wind player, a much-needed tool for brass-wind band, , or professional musicians, teachers and students. Colour:Black Material:Metal Package Contents: 1 * Trumpet mouthpiece switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.,__f0.315