Welcome to our store! 1. This violin bow straightener uses imported silicone grip feet, which are environmentally friendly and wear-resistant and do not damage the paint surface of the violin. 2. According to the three-dimensional fit of the violin's edge, the size is standard, grips firmly, fits the body, the overall line is smooth, refers to the violin's soft beauty, has good coordination, full beauty, and the elastic design can effectively correct posture. 3. This violin bow straightness corrector is suitable for 4/4, 4/3, 1/2 violins. Plays an important role in correcting and improving violin playing skills. Encourages straight bowing, the best aid for beginners. Great confidence builder for the student violinist or for the experienced player looking to improve their bow work. 5. Uses thermoplastic elastomer material, has high strength and elasticity, lightweight and comfortable, easy to carry and use. Easy to store in any violin case. Item Type: Violin Bow Collimator Material: Eco-friendly ABS + Silicone Applicable Violin Specifications: 4/4, 4/3, 1/2 1 x Violin Bow Collimator Customers are our top priority. If you encounter any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.