Sailor Ballpoint Pen Refill No. 300, 2 pieces Part Number: 18-0300 0.7mm Fine (Fine) Black Also substitutes for products using Sailor 46-0031 refills This is a clearance item due to a stationery store's product change. One pen has been opened and tested. It writes without any problems. The other one is unopened, but if you wish, please comment before purchasing, and I will open it to test it. I will then change the price to 300 yen and ship only the ones that write. This product is discontinued and old. Please understand that we cannot be held responsible for sudden writing failure due to aging. The product will be simply packaged and shipped via regular mail.