Adjustable shoulder rest for violin, compatible with 4/4 and 1/2 sizes. - Model Name: DuoMate - Application: Violin shoulder rest - Compatible Sizes: 4/4 and 1/2 size violins - Design Features: Adjustable rigid base - Materials: Combination of plastic and rubber It has been stored at home for about 7 years, so the bag is old, but the main body, including the rubber parts, is in good condition. The rubber parts do not crumble or leave black marks when touched by hand, and the stretchable rubber parts have not deteriorated. The jagged edges on the sponge part in photo 7 are from the time of purchase. It is sold on Rakuten Ichiba for 4,950 yen. I'm sorry, but I'm not considering a price reduction at this time. Thank you for looking.