Item Type: Violin Bow Grip_x005F_x000D_Colour: Black_x005F_x000D_Material: Rubber_x005F_x000D_Product Size: Approx. 10.5cm / 4.1in 1FOR 4/4-3/4 VIOLIN: This is a bow posture corrector for 4/4-3/4 violin, useful and practical, you can use with confidence 2GOOD QUALITY RUBBER MATERIALS: Made of good quality rubber materials, flexible, wear resistant, cold resistant, not easy to get discouraged. Practical and durable 3TEACH BEGINNERS TO HOLD BOW CORRECTLY: Violin bow grip aid is designed to teach beginners to hold the bow correctly, helps a lot for study 4PLAY VIOLIN MORE EASILY AND CORRECTLY: You can learn to use the grip to play the violin more easily and correctly, which bring high efficiency 5PERFECTLY FIT: The length is 10.5cm, perfectly fit for your instrument, simple to learn and convenient to use