Features:
Made of good plastic.
Designed for trumpet.
Easy to install.
Practice without disturbing people.

Specifications:
Material: Plastic
Product size: 13.5 * 7 * 7cm / 5.3 * 2.8 * 2.8in
Product weight: 50g / 1.8oz
Package size: 14 * 7.2 * 6.9cm / 5.5 * 2.8 * 2.7in
Package weight: 65g / 2.3oz

Package List:
1 * Mute