Features:Made of good aluminum.
Designed for alto saxophone.
Easy to install.
Practice without disturbing people.
Specifications:Material: Aluminum
Product size: 6.9 * 6.9 * 4.2cm / 2.7 * 2.7 * 1.6in
Package size: 25 * 17 * 4.2cm / 9.9 * 6.7 * 4.2in
Package weight: 14g / 0.5oz
Package List:1 * Mute