I will send you a brand new, unused item. [Reason for the defect] As you can see in the photos, the plating on the round part is slightly peeled off, and there are burrs. There are no functional problems. Please consider purchasing only if you are not concerned about the peeling or burrs when using it. This is a mouthpiece trainer for basic embouchure training for brass instrument players. It helps to prevent embouchure collapse and is expected to strengthen the muscles that support high notes. By using it in conjunction with instrument practice, it is expected to expand the range and improve the endurance of brass instruments such as the trumpet ◎ You can feel the load on the depressor anguli oris muscle, and I think you can feel the same effect as a long tone. However, it puts a strain on the muscles around the mouth, so please use it at your own pace ^^ If you use it before playing, you will get quite tired lol Personally, I recommend doing it in your free time ( *´`*) For cleaning, as it is made of stainless steel, it is recommended to wipe it with a soft cloth dampened with water! Do not use silver polish or lacquer. ※Please note that this is not a Warburton P.E.T.E.