Bon Musica Viola Shoulder Rest for 15.5 inch This shoulder rest has an adjustable pad that fits the shoulder for stability. I stopped playing the viola after about 3 months, so I haven't used it much. Therefore, the condition is good, but please understand that it has been stored at home for about 5 years. Please check the following link for product details. https://www.violinsupply.co.jp/Link/items/Shoulder/bonmusica.html