The Thomastik Resina Euphon 199 is a medium-hardness (medium) rosin for violin and viola, made from spruce. It provides a strong grip on the bow hair, responds well to high temperatures, and has minimal dust dispersion. It comes in a hard plastic case along with a cloth.

The rosin helps improve the contact - friction of the instrument's string with the bow hair, ensuring better sound performance, while also giving the musician a better bow feel and immediate sound response.