Description This violin bow straightener is made of s ilicone and TPE material, durable and comfortable to use. This violin bow straightener is used to correct the wrong playing posture to develop a good bowing habit for beginner, a professional accessory for violin players. Features -Color:Purple-Material:Silicone, TPE-Size:7.70X7.00X4.90cm/3.03X2.75X1.93in- Made of silicone and TPE, the surface is smooth, can maximize the wear life and prevent rust.- Exquisite craftsmanship, carefully crafted, durable and wear-resistant, easy to use, long service life.- Excellent for 1/4, 1/8, 1/10 violin , great for beginners to use to master the correct bowing action.- Self bowing practice guide, violin bow straightener is difficult to break off, no harm to your instrument.- This violin bow straightener is simple in structure, making the installation quick and convenient.Packing list: 1 x Violin Bow Collimator