Unused? Kohkento Concentrator, Kuroda Seisakusho "Unused?" implies it might be unused, but due to long-term storage, please understand there may be scratches and dirt. If you are particular about the condition or are concerned about dirt and scratches, or if you don't know how to use the images, please refrain from purchasing. Please consider it as used for precaution. Shipping is only via Yamato cash on delivery. Please refrain from purchasing if you are in Hokkaido, Okinawa, or other remote islands. Please understand that no other shipping methods are available. Regarding this item, please only purchase if you agree not to complain about anything later. The items in the images are all that is included. I will not leave a negative review, so please only purchase if you can promise not to leave a negative review either. Mercari, this is not a medical device, but a part. Please do not delete it by mistake, thinking it is a medical device.