Thank you for viewing. I am selling this item to organize my collection. This is the KATO 10-1913 E231 series 500 series Chuo/Sobu Line 4-car add-on set. I purchased it new a few months ago. I have opened it for the purpose of listing it, but it has never been used. Please forgive any minor scratches on the case due to storage. Although it is an unused item, it has been in someone's possession, so please refrain from purchasing if you are sensitive to this. Regarding the product, we ask for no cancellations or returns. We are looking forward to your purchase if you understand all of the above.