Mach One shoulder rest violin 4/… Mach One Synthetic, shoulder rest for violin 4/4 - 3/4 Item No. M07 Manufacturer Peter Mach Mach One, replacement foot … Mach One synthetic, feathery shoulder rest for violin 4/4 - 3/4 × Mach One Synthetic, shoulder rest for violin 4/4 - 3/4