Item Type: Violin RosinMaterial: Rosin + Composite WoodColour: Black 1High Quality Materials: Rosin with rosin and composite wood as materials, natural low dust and harmless to the human body. 2Flannel Package: The rosin is wrapped in protective flannel and transported in an anti squeeze box to prevent cracking. 3Firm Grip: Rosin has a smooth and firm grip and dust free adhesion, which will not scratch the instrument. 4Super Sensitivity: Rosin has super sensitivity, which can make the instrument sound sensitive, pure and moving tone, and reduce noise during performance. 5Purpose: This is a rosin for violin, viola and cello or erhu, and is also a better choice for beginners and practitioners.