G-18 Pen Nibs, Round Pen, School Pen, Set of 12 ZEBRA Round Pen 2586 - 3 pieces Tachikawa School Pen n-5 - 9 pieces The model numbers were determined from the markings on the nibs. Please note that these may differ from current models as they are approximately 20 years old. This is a set of 12 individual pen nibs. All are unused, but they have been stored for over 20 years. While the original packaging is not included, they will be shipped in the case they were stored in. I decided to sell them because it felt wasteful to throw them away. Packed in an OPP bag and double-layered bubble wrap. Shipped via Yu-Packet Post Mini. Instant purchase is welcome.