I bought these Faber-Castell refills when I discovered that they also work in my Sensa pens, which are great pens for writers. Unfortunately, Parker bought Sensa, and Parker ink doesn't work well. Service from the Pen Place is rapid. I am very grateful I found this company. I will continue to buy my supplies from them.
Easy to find refills and place order online. Prompt shipping. A no-nonsense shopping experience. Highly recommend.