Description This item is a violin bow straightener, made of premium steel wire material, it is durable and use. It is used to correct the wrong playing posture to develop a good bowing habit for beginner. it adopts double section double track design, it is more stable and convenient. Features - Color: As Shown. - Material: Steel wire. - Size: 12.00X8.00X5.00cm/4.72X3.14X1.97in - Self bowing practice guide and it help you cultivate correct bowing and wrist action. - The angle of the bow straightener can be adjusted by yourself. - It is more convenient for beginners to practice. - Durable and meticulous workmanship. Lightweight for portable carry. - This straight orthosis is easy to use and has a remarkable effect, allowing the practitioner to pay more attention to the rhythm and intonation.Package list: 1 x Violin Bow Collimator