How: This rosin helps to ensure the sound quality of your music, creating a nice, smooth touch on your violin, viola or cello. The dark color provides grittier sound quality, smooth playback and clear, bright sound. The high-quality materials are environmentally friendly and durable. Make the pronunciation of the instruments sensitive and enjoyable. Natural rosin has less dust and protects the human body from damage. With wooden storage box for easy use and storage. Excellent value for money and perfect for professionals and beginners. It can be used as gifts for family, friends and children. Specifications:Rosin Color: Light Yellow (as shown)Rosin Size: 2.2 x 1.1 x 0.5 inch/5.5 x 2.8 x 1.3cm Shell Size: 2.6 x 1.6 x 1.2 inch/6.5 x 4.1 x 3.0cm Rosin Weight: Approx. 51g / 1.8oz Package List:1 x Rosin1 x Wooden BoxNote:1. Please allow 1-3mm error due to manual measurement. Make sure you don't mind before bidding.2. Due to the different light, angle and display taken by the camera, the picture may not reflect the actual color of the subject.3. Thank you for your understanding.