My children and I are big fans of Frixion Pilot pens. Thus they may be used in the primary school as a filler replacement, that's a great thing. Because of the clean typeface we switched to the "fineliners". That is 0.4 mm stroke width. Unfortunately I have now ordered all refills wrong. In the product description of the blue refill stroke thickness is 0.4mm. In fact, he has 0.7mm. I then only the color selection have met all my pens are now too fat! Pity!
