This is a new, unused item. This is rosin for string instruments that significantly improves sound quality. This is the dark type, perfect for powerful performances. It offers good grip and is recommended for those who play fast-paced music or want to produce a powerful sound. Generally, beginners find the dark type easier to use. [How to Use] Use this when you feel your violin isn't producing enough sound. The recommended frequency is about 2-3 times a week, and the amount used per session should be determined by how it feels and the sound produced. Also, if the bow feels like it's catching on the strings during playing, or if white powder is flying around, you are using too much. If the bow is slippery and the instrument doesn't produce sound easily, you are using too little. Please adjust as needed. Producing a good sound makes practice even more enjoyable and significantly speeds up your improvement. Practice with this rosin and set yourself apart from everyone else! [Notes] - Due to the manufacturing process, there may be minor scratches, uneven coloring, or small stains. We are offering this item at a low price because of this. - The surface of the rosin may appear white and powdery. We appreciate your understanding of the product's condition. Thank you.