Bonmusica Viola Shoulder Rest 15.5 inch It has a movable pad that fits the shoulder, providing stability. I stopped playing the viola after about 3 months, so it hasn't been used much. Therefore, the condition is good, but please understand that it has been stored at home for about 5 years. Please check the product details from the link below. https://www.violinsupply.co.jp/Link/items/Shoulder/bonmusica.html