Even if you’ve never heard of Schmidt, there’s a very good chance you’ve used some of their products. They make refills for a lot of the top pen brands in the world (Eg: Sheaffer, Faber-Castell, Kaweco and many other reputable pen brands - some pens arrive with a Schmidt refill inside, but many others have a Schmidt refill with the pen maker’s brand printed on it. They make a huge range of refills, with some available in a good choice of colours and tip sizes. Schmidt are a world leader in the technology behind manufacturing pen refills