Feature: The simple way to practise straight bowing This product is a violin bow straightener, made of high- quality ABS material, durable and easy to use. It is used to correct the wrong playing posture, so as to develop a good bowing habit for beginners. It adopts double- section and double- track design, which is more stable and convenient. Specifications: SKU: VP0908-451 size: about 100 x 50 x 85mm Material: ABS colour: black Package Contents: 1 x Violin bow straightener Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.