This blue refill is suitable for the Basic ballpoint pen from Faber-Castell. Replace the original refill as soon as it is empty, so you can continue to use your favourite pen. This medium refill writes very comfortably, is smudge resistant and has a line width of 0.4mm. As well as stocking the popular Canon, Brother, Epson and HP brands, amongst others, you can also opt for the 123ink compatible versions. Our own-brand ink cartridges and toner cartridges contain more ink than the original brands and will save you money! Not to mention that all of our 123ink products also come with a 100% lifetime guarantee.