Function: 1 2-prong metal silencer muting cello sound 2. Heavy metal exercises are muted to minimize noise. 3 This metal cello silencer is made of sturdy zinc alloy. 4 Metal muted sound is much lower than rubber sounds. 5 Perfect for students and beginners, sturdy and durable. Specifications: Item Type: Cherokee Mute Material: Zinc Alloy Color: Silver Size: 40 x 40 x 13mm / 1.57 x 1.57 x 0.51in Weight: 85g / 3(approx) Package List: 1 x Celomute