Rosin 807 has the advantages of strong viscosity and high friction, which is helpful to improve the friction of bow hair and enhance the playing effect. Good durability, long service life, no need for frequent replacement.
Rosin 603 has high fineness and soft hand feel, which is suitable for beginners. It is not easy to block the strings, which is beneficial to keep the strings clean and healthy.
If you need rosin with high viscosity and high friction, you can choose 807, and if you need rosin with high fineness and no string blockage, you can choose 603.