Clarinet reeds. Vandoren V12, strength 3. I am selling a total of 20 reeds: 10 regular reeds and 10 EXT-treated reeds. The EXT-treated reeds were purchased from Dolce Music. The reeds have been played for about 30 minutes each. They will be gently wiped with alcohol disinfectant before being shipped. The reeds will be wrapped in bubble wrap for shipping. The reed boxes will be folded for shipping. Please refrain from purchasing if you are looking for a perfect product. [What is EXT Treatment?] Quoted from Dolce Music This is the name Dolce Music gave to a patented "method of removing stress from instruments." It is an abbreviation of Effect X Treatment. EXT treatment is a groundbreaking process that removes stress (tension, the repulsive force generated in the material when metal is stretched or bent) that occurs during the manufacturing process of instruments, dramatically improving sound quality and playability. It has been proven to be effective on reeds as well.