Straighten Posture Violin Bow Straighten Collimator Violin Training

Label:Yes Package Contents: 1PC Violin Bow Corrector Suitable for:1/2 3/4 4/4 1/4 Violin colour: Black Size: 12.5*12*3.7cm(4.92*4.72*1.46in) Material: Metal+silicone eatures: Easy to install and disassemble. Self bowing practice guide. Mini size and lightweight. Great for beginners to master correct bowing action.