This is a lightweight shoulder rest designed to reduce fatigue while playing the violin. Adjustable size for 4/4 and 3/4 violins. The part that secures the rest to the violin is made of rubber for a firm hold. 【Color】 Black 【Size】 4/4 3/4 SIZE Approximately 21 cm *Please note that these measurements are approximate and may have slight variations. 【Materials】 ABS, Sponge, Rubber Although we inspect the items, please be aware that imported goods may have some imperfections in the stitching. Packaging will be simplified to keep costs down. If you find any defects in the product, please contact us before leaving a review. We may have difficulty addressing issues after a review has been submitted. Returns due to customer circumstances are not accepted. We have a large stock available. Bulk purchases are also possible.