The adjustable strap with fine workmanship is firm and strong, difficult to break off, wearable, no harm to your instrument.As a self bowing practice guide, it helps you cultivate correct bowing and wrist action.Transparent part is made of tough plastic, durable in use. The hook and loop closure design is easy to mount on or take it down.The length of this product is 6.3cm, the width is 5.7cm and the height is 1.5cm.It is a very desirable item for violin beginners and violinists, playing a great role in mastering correct bowing action and improving their playing skills.Item Name: Violin Bow StraightenerMaterial: PlasticApplication Option: 1/8 - 1/4 ViolinsFeatures: Easy to Use, Durable, Violin Practice AccessoriesSize Details: 6.3cm x 5.7cm x 1.5cm/2.48" x 2.24" x 0.59" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Violin Bow Straightener (Others Not Included) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store