My child, who has sloping shoulders and couldn't use a KUN shoulder rest, was recommended this by their teacher, and we used it for about six months. It seems to have become much easier to use because it's adjustable. I'll include the instruction manual. I've kept it at home for about a year, so I'll include four replacement rubber feet. According to my Rakuten order history, I purchased it for just over 6000 yen. I will pack it as thinly as possible and ship it. Thank you very much. Adjustable shoulder rest, cushion material that supports comfortable playing. - Model: WOLF Forte Secondo 4/4-3/4 Violin - Color: Black - Features: Adjustable shoulder rest - Material: Cushion material - Country of Manufacture: France Thank you for looking.