We have already determined from these fillers 8 ge (ver) needs. Since he is still rated as good and is often ordered as a centralized order by the teachers, but we bought it again and again and have also been repeatedly disappointed. It is good for the first letter, our children are always so have coped. but then began all our pen pretty quickly blot on. Ink came out at the junction to the wooden shaft and the fingers were always blue, which then also caused blobs in the magazine. The second thing is that the lid ausleihern very quickly and no longer hold. If they are not lost, they nevertheless always flying around in the pouch and the spring is no longer protected. The then always wore to the fact that we could not use this as long as we wanted filler. The cartridges are now so well and also get low and the converter are very helpful if you are staying somewhere where there are no cartridges. The wood design is probably more for the parents than for the children. The pen writes well otherwise, but it is not durable enough.