Hill Premium Rosin for Viola W.E. Hill & Sons Premium Rosin Used only 3 times. In beautiful condition. High-end rosin. W.E. Hill & Sons has always pursued the highest quality accessories for stringed instruments. This new premium rosin set is perfect for players seeking the optimal level of control when playing. It is significantly upgraded in both the initial level of grip due to friction and controlled release. Blended with a unique formula to ensure the best performance, this rosin, developed to enhance the level of instrument control, is housed in a maple wood holder engraved with the historical W.E. Hill & Sons logo and comes in a color-matched drawstring bag.