Robert Oster Signature Ink--Motor Oil
Robert Oster Signature Inks are known worldwide to fountain pen users as top-quality ink with a wide variety of colors. Some very unique colors. Robert and his company believe in making the world a better place by giving back. Giving back to the world in general and giving back to the pen/ink community. The name of this ink pretty much tells you the color. Comes in a 50ml bottle.