Natural Low-dust Rosin:This product is made of natural resin, safe and environmentally friendly, low dust, can protect the human body from harm, strong adhesion, easy to use, low dust, high viscosity, not easy to break and not easy to crack, Make the musical instrument sound sensitive and clear. High Sensitivity:This rosin has good viscosity, excellent grip and penetration, can produce a beautiful and powerful overall sound, can make the instrument emit a pure and clear sound, reduce noise, make the violin viola The sound is better. Four Square Rosin:There are 4 violin rosin in this rosin set, size: 4.5*3*1.6cm, the appropriate size can be carried with you, very suitable for all kinds of steel strings and synthetic strings, helping the instrument to deliver authenticity Pure and clear sound. Easy to Use:The new rosin is very smooth. When using this product, open the rosin and use a sharp object to roughen the surface of the rosin to make it easier for the rosin to stick to the bow. Put the top of the bow hair on the rosin and push it forward slowly. Instrument Essential Hardware:Traditional handmade rosin, specially designed for violin, viola and cello. It is suitable for the adjustment and improvement of the sound quality of the violin, the best gift for beginners and practitioners of violin, cello, and viola.