MACH ONE Shoulder Rest Double Injection M-07 Violin 4/4-3/4 Purchased in January 2025 and used for about two and a half months. I also used cloth to prevent my skin from directly touching the non-slip parts, so there are no noticeable stains. There are some original color irregularities in the resin, but this does not affect use. To reduce shipping costs, I will disassemble the legs before packing and shipping. Features MACH ONE is a major shoulder rest manufacturer. This shoulder rest focuses on acoustic properties. It is lighter and slimmer than wooden shoulder rests. Specifications ■ Shoulder rest ■ For violin 4/4-3/4 ■ Made of special plastic