TOOGOO(R) Black Rubber 4/4 Violin Practice Mute Great for practicing playing violin when you don't want to disturb your family or friends Very easy to use, just put it on top of the bridge Compatible with 4/4 violin Made of rubber Dimensions: Approx. 2.1 (L) x 1 (W) x 0.6 (H) inch (5.3 x 2.5 x 1.5cm)