Archet Rosin for Violin, Viola, and Cello - Tenor - Made in Japan Used a few times on viola. I think it's originally intended for cello. For those who are already using it. Reference Price: ¥5,000 (including tax) (Amazon) Product Description (from Amazon) A grip on the strings and a deep tone. This rosin is characterized by its deep, mellow tone and reliable playability. It brings out a powerful volume, making it popular not only for cellists but also for solo violinists.