Both cork pieces are missing!! 【Lightweight】The lightweight design is very convenient to use and carry. 【Excellent Durability】Made of high-quality aluminum alloy material, it is tough and durable, and can be used for a long time. 【Doesn't Disturb Neighbors】Designed to cut the sound of the trombone, it can be muted, allowing you to play freely and comfortably without disturbing your neighbors. 【Clear Sound】Reduces noise and helps to produce a clear sound. 【Trombone Practice Mute】A good practice mute specifically for trombones, the perfect item as a gift for music lovers. 9-152078