Suitable for Trumpet, trombone, tenor, tuba, big hug, horn, etc. most Brass instruments. Beautiful colors, Portable,light weight,easy to use Note: When pulling the nozzle, the screws on both sides should be fine-tuned at the same time.Some customers have too a screw adjustment on the side of the nozzle, which causes The mouth to be unbalanced, so that the nozzle cannot be pulled out,and the contact nozzle is deformed or notched, which may cause difficulty in pulling out Colour:Black Material:Metal Size:10x10x3.5cm Package Contents: 1 * Small mouthpiece puller 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.