If you are looking for a stable bow grip, I can tell you that our product will be your . Use premium rubber materials, can use it for a long time. Although the design is simple, this bow grip corrector is very practical to use. Features - Color: Black -Material:Rubber - Size: 3.00X1.00X1.00cm/1.18X0.39X0.39in -Note: Suitable for cello -Using premium rubber materials, this violin bow grip to provide you with use. -Essential violin accessories for children to correct wrong postures, which can effectively correct wrong postures. -Small and light, easy to carry and store, prevent it from taking up too much space. -Fine workmanship, , details, simple use and convenient operation. . -Easy to install and remove the bow grip, suitable for children to correct posture, but also suitable for adults. Package list: 4 x Violin Bow Grip