Thank you for viewing. I strung these from December 31st to January 12th, and then removed and stored them, so the usage period was about two weeks, and they are in beautiful condition. These gut strings produce a warm sound unique to gut, and the overtones increase, resulting in a very pleasant resonance. I purchased a new set for about 27,000 yen. They are still in usable condition, so I can't lower the price too much, but I will consider a small discount for serious buyers, so please feel free to contact me. I have discarded the outer packaging, so they will be in a different bag. Please understand. The A and D strings are ball-end, and the G and C strings are loop-end, but the knots can be hooked into the tailpiece holes just like ball-end strings.