Mitsubishi Pencil uni Jetstream Paper Package 0.38mm 20 pieces SXR8038K. The outer box of the ballpoint pen is not included. ◆ There are 20 replacement ink colors, but Please let us know if you want to change them. Black, Red, Blue, Green This is a 0.38mm refill ink for the smooth oil-based ballpoint pen, Jetstream, from Mitsubishi Pencil. Jetstream is very different from conventional oil-based ballpoint pens, offering a smooth writing feel and quick-drying properties, allowing you to draw clear, dark lines smoothly. It was renewed in November 2022, with a 10% increase in ink volume and a paper package to achieve continuous and effective plastic reduction. In addition, the printing on the refills has been improved to be clearer and easier to see, which also helps prevent incorrect purchases. Compatible products: SXE3-400-038 / SXE3-507-038 / SXE3-601-038 / MSXE3-500-038 / MSXE3-701-038 / MSXE5-1000-038 and other multi-color, multi-function Jetstreams (excluding Jetstream Prime)