■ Product Details PILOT Fountain Pen Cleaning Set (for nib and section) FOS-5S, new and unopened. ○ Features ・Easy to use as it comes with a single-use cleaning solution in an aluminum pack. ・Dilute the cleaning solution with tap water and use the included dropper for cleaning. ※ Please note that it cannot be used with some fountain pens. How to Use ① Attach the cleaning dropper to the nib and section, and press the dropper in a glass of water to clean the inside of the nib and section. ② Discard the dirty water after cleaning, and dilute one packet of cleaning solution (8ml) with 100ml of water. ③ Soak the nib and section in the diluted cleaning solution for 8-10 hours. ④ Replace the water in the glass with clean water. ⑤ Attach the cleaning dropper to the nib and section, and while replacing the water in the glass, press the cleaning dropper about 10 times to rinse out the cleaning solution inside the nib and section. ⑥ Remove the cleaning dropper, rinse the inside of the nib and section thoroughly with running water, wipe off the moisture with a cloth, and let it dry. ■ Notices Thank you for viewing my listing from among many others. I try my best to provide detailed information about the product condition, but please feel free to ask any questions you may have. The condition is based on my personal subjective assessment, and as the item has been handled by a person, please understand this. If you are a very sensitive person or are not satisfied with the product description, please refrain from purchasing. In the unlikely event that the product received differs from the description, or if there is any problem with the product received, please let me know. I will take responsibility and respond accordingly. Combined shipping is welcome. You can save on shipping costs, so please feel free to ask. (Some items may not be eligible depending on the size) We reuse packing materials. We use recycled packing materials, so the appearance may be a little rough, but we strive for sturdy packaging.