Compatible With 4/4 & 3/4 Violin: Height, width, angle can all be adjusted by the screws available on both sides, fit 4/4 and 3/4 violin sizes, as well as 13" or 14" violas. Traditional areas of high stress are reinforced for long term durability. | Ergonomic Design: The unique computer-modelled 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. Net weight is 57g, you will never feel tired or painful on your shoulder during the practice and playing. It's the perfect choice for beginners and professionals, kids and adults. | Premium Matreial: Each violin shoulder rest base is made of high quality resin(ABS) material, and the other surface is made of soft and thick EVA foam, which provides both maximum comfort and excellent support. | Grips Tightly: The rubber feet grips are made of a soft, non-skid, wear-resistant silicone material, which can prevent your violin from any damage or scratches. | Complete Set: Together with the violin shoulder rest, a violin practice mute and a rosin are packed. Great for practicing and playing the violin when you don't want to disturb your family or neighbors.