Traditional areas of high stress are reinforced for long term durability.The unique computer-elled design of the shoulder rest ensures the excellent support and stability, which can prevent the violin from falling off, eliminate the pressure on your chin and neck.It's the perfect choice for beginners and professionals, kids and adults.Great for practicing and playing the violin when you don't want to disturb your family or neighbors.Compatibility: 3/4 and 4/4 violinsMaterial:Plastic + rubbercolour:blackPackage Contents:1 * Violin Shoulder Rest1 * Violin Practice MuteOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.