Product Details: Mitsubishi Jetstream multi-color ballpoint pen refills (SXR-80-05) Ink colors: Black x 5, Blue x 5, for a total of 10 refills. All are unused and unopened. Condition: All items have been stored in their individual packaging. Although the purchase date was a while ago, they have not been used, so there is no deterioration or staining. Please check the condition in the images. Model Number: SXR-80-05 Ink colors: Black, Blue Ball diameter: 0.5mm Compatible Ballpoint Pens: Compatible with Jetstream multi-function pens, 3-color ballpoint pens, etc. (Please check the model number of your pen) Etc. Shipping: Will be shipped via anonymous delivery (Rakuraku Mercari or Yuuyu Mercari) in an envelope, with cardboard reinforcement and waterproof packaging. Other: These items are stored at home, so please refrain from purchasing if you are concerned. If you wish, I will consider price adjustments, so please feel free to comment. I plan to list other refills as well, so please take a look.