Packing: 1PC trumpet mute silencer Material: aluminum alloy + rubber Color: silver Dimensions: Length: 135mm (5.3in), Inlet Diameter: 18.5mm (0.73in), Outlet Diameter: 61mm (2.4in) Sturdy, fine workmanship, bright appearance, durable and long service life. Perfect for music lovers to practice or warm up quietly at home or before a show. Often helps trumpet players integrate better with other instrument players. Can effectively improve playback sound and reduce noise. The perfect accessory for trumpet lovers. Suitable for all types of trumpets and often helps trumpet players blend better with other instrument players.