Retired item: Mass damper set. Many of the items have been used. They are used. Returns and exchanges are not accepted. I was into this about 5 years ago and left it as is, so there is a corresponding amount of wear and tear. Please purchase only if you understand that returns, exchanges, and claims are not accepted. Sold as is. It was stored in a 100-yen shop case. *The case is bulky, so it will not be included.