Kun Solo Violin Shoulder Rest - Kun (Solo) Collapsible (4/4) Authorized dealer over 40 years USA. - Gary Ritter Strings Shop - Michigan - Shipping outside lower 48 states USA and HI. - AK - PR. will be calculated. Fits 4/4 Violin A new collapsing mechanism means its feet can be folded easily for storage. A simplified, quick-adjust finger lever allows for ultra-fine size adjustments, while the wide shoulder end provides added comfort. The patterned cut out in the Solo's sponge rubber reduces weight, improves grip and ensures air flow around the shoulder and neck. Kun Quality