This cost-effective rosin is universal for horsehair and synthetic hair bowed instruments.The instruments rubbed the rosin pronounce sensitively and play pure and pleasant tone with less noise. Features: Strong adhesion,increase the friction and make the effect last .Low dust,protect the player from the harm of dust. The instruments rubbed the rosin pronounce sensitively and play pure,full and pleasant tone with less noise. Suitable for all kinds of horsehair and synthetic hair bowed string instruments. Color:yellow Material:Resin Size:4.5*4.5cm Package Contents: 1*Violin Rosin 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.