Thank you for viewing. ■ Product Name: Violin Bowing Practice Guide Correction Device HorACE Bow Guide (for HorACE Bow Guide) for 4/4 to 1/2 size Ideal for practicing for those whose bows tend to slant. I have used it a few times, so there may be some minor scratches, but it can be used without any problems. We appreciate your understanding of home storage, etc. Type: Violin Accessories/Parts: Other Level: Beginner