Item Description: natural ingredients Violin, viola and cello designs Not prone to allergies and less dust Features: Material: rosin Color: as shown in the picture Size: as shown in the picture Strong adhesion: After rubbing the bow hair evenly once, the playing time can be extended by more than twice that of ordinary rosin. Sensitivity: It can make the sound of the instrument sensitive when playing, the tone is pure and moving, and the noise can be reduced. Dust-free: Very little powder flies out during performance, allowing performers to avoid inhaling dust and reducing harm to human health. Quantity: 1 piece