Manufactured in the USA, Super-Sensitive MR913L Mini-Rosin is designed the same formula as the larger, Original Rosin made by the Super-Sensitive Musical String Co. Packaged in a neat, compact cardboard case, this is ideal for younger players. Easy for small hands to use, this rosin is a good choice for students looking for a handy, multi-purpose rosin to store as a spare or carry around in a pocket when gigging regularly. Super-Sensitive MR913L Rosin is a natural product made from the resin secreted by fir and pine trees. The resin is heated and mixed with oil and other ingredients, then cooled and allowed to solidify in the now familiar cake form. The carefully guarded recipes vary considerably and are carefully formulated to suit different types of strings and playing styles. This particular rosin is hard & solid – Perfect for Violin & Viola bows due to its size, & ability to cope with extreme heat without melting, unlike some softer rosins designed for the likes of Cello & Double Bass bows.