DescriptionThis rosin is used for increasing the friction between the bow hair and string. With this rosin, you can make clear and bright sound of violin, viola or cello. The instruments rubbed the rosin pronounce sensitively and play pure,full and pleasant tone with less noise.Features-Color: Yellow -Material: Rosin -Size: About 4.50X2.70X1.00cm/1.77X1.06X0.39inch - To increase the friction between the bow hair and string. - With this rosin, you can make clear and bright sound of violin, viola or cello. - The instruments rubbed the rosin pronounce sensitively and play pure,full and pleasant tone with less noise. - Superior sensitivity, can make the instrument in the performance of the pronunciation sensitive, reduce noise. - Less dust, reduce the harm to human health.