1 pcs Metal Violin Quiet Practice Mute & 1 pcs Bow Straighten Collimator Easy to install and disassemble. Self bowing practice guide. Mini size and lightweight. Great for beginners to master correct bowing action. Violin Mute: Metal practice mute for violin Material: Metal Color: Golden Size: Approx. 1.97 x 0.94 inch / 5 x 2.4 cm Violin Bow Corrector: Material: Plastic Suitable for: 1/2-4/4 Violin Size: 6.3 x 5.7 x 1.5cm colour: Black+Transparent white Package Contents: 1 x Violin Mute 1 x Violin Bow Corrector Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.