⚫️ Fisher Space Pen ⚫️ Replacement Refills Product Description This is a Fisher Space Pen. It's a pressurized ballpoint pen, famous for being adopted by NASA. ・Writes upside down (you can write even with the pen tip facing up) ・Writes underwater ・Usable in extreme temperatures (approximately -35°C to approximately 121°C) ・Uses a pressurized ink cartridge It has a solid metal construction and a luxurious feel. It's a popular pen for outdoor activities, work, and emergency preparedness. Ink color: Black (Medium) ※ Refills are genuine Fisher ＜Notes＞ Please consider this item with the understanding that it is a used item and has been stored at home. The pen has small scratches. The refill package has tears and stains. Please understand this before purchasing. Please refrain from purchasing if you are sensitive to imperfections or seek a perfect item.