Wolf Forte Primo Violin Shoulder Rest for 4/4-3/4 Made with sturdy but flexible aluminum which allows the player to shape the shoulder rest to their liking. The bottom side has a wide pad made of comfortable rubber. Included with the rest are two plastic spacing tubes which allow the arms to be stable when put into the highest position. Features: - Curved shape - Adjustable in height on both sides from 0.5cm to 8cm - Adjustable to any angle - Adjustable to any width - Flexible backplate for custom ergonomics