In Stock. Premium rosin formulated from a piece of rosin found in a violin case dating to 1699. Produces extraordinary quality of tone and feel. Available in two grades; Symphony and Solo for Violin/Viola and Cello. Many players notice a smoother tone, often with less surface noise. Recommended that players experience both types, Symphony and Solo to apply custom blend according to personal preferences, coarseness of bowhair, climate conditions, and music being performed. Twin Pack includes handsome gift box.