The professional trombone horn cover, made of material, is practical and durable for long time use. Provide and healthy environment for the audience and yourselves. Great for you to practice at home or go out for a performance. Features -Material: polyester cotton -Size 2XL: About 18.00X18.00X0.30cm/7.07X7.07X0.12inch (It is recommended to use instruments with a diameter of about 19-23cm.) -Size 3XL: About 20.00X20.00X0.30cm/7.86X7.86X0.12inch (It is recommended to use instruments with a diameter of about -27cm.) -Size 4XL: About 25.00X25.00X0.30cm/9.82X9.82X0.12inch (It is recommended to use instruments with a diameter of about 28-34cm.) -Made of material, and safe, you can use it with confidence. -Designed for the trombone is a very intimate and practical small item. -The design is simple and the operation is simple. You only need to put it on the mouth of the speaker, and it is easy to remove it. -This horn protective cover can effectively prevent and prevent from entering the tube. -It can also effectively reduce the volume when practicing at home without affecting other people. Package list: 1 x Trombone Horn Cover