Features: Two alternatives, one is applicable to 1/8 - 1/4 violins and the other one is used for 1/2 - 4/4 violins. Transparent part is made of tough plastic, durable in use. The adjustable strap with fine workmanship is firm and strong, difficult to break off, wearable, no harm to your instrument. The hook and loop closure design is easy to mount on or take it down. Self bowing practice guide and it help you cultivate correct bowing and wrist action. Very desirable term for violin beginners and violinists, playing great role in mastering correct bowing action and improving their playing skills. Specification: Condition: 100% Brand New Material: Plastic Color: Transparent + Black Application Option: 1/2 - 4/4 Violins Weight: Approx. 24g Packing List: 1 x Violin Bow Corrector Package List 1Two alternatives, one is applicable to 1/8 - 1/4 violins and the other one is used for 1/2 - 4/4 violins. 2Transparent part is made of tough plastic, durable in use. 3The adjustable strap with fine workmanship is firm and strong, difficult to break off, wearable, no harm to your instrument. 4The hook and loop closure design is easy to mount on or take it down. 5Self bowing practice guide and it help you cultivate correct bowing and wrist action.