This black rosin is suitable for horsehair and synthetic hair bowed instruments like violin, cello, viola and so on, and especially for players in cool, dry areas. Just rub some rosin on the bow hair so it can grip the strings and make them make sound clearly. The violin rosin can be also applied to the bridges in other musical instruments, such as the banjo and banjolele, in order to prevent the bridge from moving during vigorous playing. It's a great tool to help you to create a pure, full and mellow tone when playing the instrument. Feature - Color: Black- Size: 4.30X4.30X3.00cm/1.69X1.69X1.18in - Material: Rosin, plastic- The rosin adopts traditional formula and high technology working process.- Strong adhesion, increase the friction and make the instrument pronounce sensitively and clearly.- Low dust, protect the player from the harm of dust.- Reduce the dry tone of the instrument and deliver really pure and clean sound without noise.- The violin rosin can be also applied to the bridges in other musical instruments, such as the banjo and banjolele, in order to prevent the bridge from moving during vigorous playing.- Suitable for horsehair and synthetic hair bowed instruments like violin, cello, viola and so on, and especially for players in cool, dry areas.Packing list: 1 x Rosin