This is an excellent maintenance tool for stringed instrument, can help the friction between the bowstrings, also make your instrument create a beautiful tone. Small in size, light in weight, easy to use, this violin can be a very important instrument maintenance tool. Features -Color:Assorted Color -Material:Resin -Size:5.70X3.70X2.60cm/2.24X1.45X1.02in -This violin is suitable for repairing bows on most musical instruments, very practical. -Your violin practicing friends will be delighted to receive this erhu as a gift. -This viola is suitable for use on violins, erhus, and violas, making it highly versatile and useful. -This for violin is suitable for both beginners and experienced players, and will help maintain your beloved erhu. -The instrument makes a present option for musician friends and family members who will appreciate it greatly. Package list: 4 x violin rosins