This product is made of quality plastic and silica gel, which is durable for long term use. Suitable for professional 4/4 Violin. Perfect fittings for you. Features: Fretboard sticker helps to locate precisely and can ensure the coherence of your practice. More efficient and consistent. The string is with metal bead head, rustproof and durable, which can also create bright sound. The mute can make the sound of violin lighter, during the process of use, it only change the volume but not the quality of the sound. Professional shoulder rest is not easy to fall off, and it can greatly reduce the pressure on the neck and cheek. Suitable for professional 4/4 Violin. Perfect fittings for you. Specification: Item: Violin Fittings Material: Plastic, Silica Gel Colour: Shown as Picture Size: Approx. 5.5 * 1.0 * 2.8 cm / 2.2 * 0.4 * 1.1 inch (Mute), 21.3 * 4.8 * 0.05 cm / 8.4 *1.9 * 0.02 inch (Fretboard Sticker), 21 * 3.1 * 3.8 cm / 8.3 * 1.2 * 1.5 inch (Shoulder Rest) Weight: Approx. 114 g / 4.0 oz Package Included: 1 * Mute 1 * Fretboard Sticker 1 * Shoulder Rest 1 * Set of Strings Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1Fretboard sticker helps to locate precisely and can ensure the coherence of your practice. More efficient and consistent.? 2The string is with metal bead head, rustproof and durable?, which can also create bright sound. 3The mute can make the sound of violin lighter, during the process of use, it only change the volume but not the quality of the sound. 4Professional shoulder rest is not easy to fall off, and it can greatly reduce the pressure on the neck and cheek. 5Suitable for professional 4/4 Violin. Perfect fittings for you.