I received my blue Cross Ion pen as a gift when I was a child, years ago. However, back then, I brought it with me on a plane, and the pressure caused the ink to explode! I was a smelly and unforggetable experience. Years later, I managed to clean the pen, but had figured that I would never be able to find a refill ink. Fast-forward to this year, 2026, when I started wondering if I could still find a compatible refill? And to my surprise, a trustworthy-looking replacement was listed on pensandpencils.net, and so I ordered it! The refill (in "Nucleus Black") has a wonderful flow that started working immediately, and the ink is deposited as a deep black line. It has a distinctive scent, and it was like my old pen was new again! Thank you!!!