This is a Wolf shoulder rest. It's old, but the sponge is in good condition, and apart from the rubber, it hasn't deteriorated much. The rubber seems like it can still be used without needing to be replaced. This patented shoulder rest from a Dutch brand is height-adjustable and compatible with 1/2-1/4 size violins. The shoulder rest part can be freely deformed, allowing you to adjust its shape to fit your body type and playing posture, and the height is also adjustable. It should be easy to fit children with longer necks. One leg will be detached when shipped. (For the sake of thinness and to prevent damage) Violin Shoulder rest Wolf WOLF