Description Features: 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. Specifications: Material: Plastic Weight: approx. 60g Color: As the Picture Shows Size: approx. 100x50mm/3.94x1.97 inches Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 x Violin Bow Collimator