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These syringes are exactly what I was looking for cleaning and refilling fountain pens, converters and cartridges. The blunt needles are small enough to store in the syringe for easy transport and storage. If this is why you are buying these it would be an excellent choice for you.
I was making a terrible mess trying to fill my converter before these (funny thing is that I was using UV ink so it was an invisible mess but if SIU shined their lights on my hands they would have pegged me for a pervert or something)
I didn't have any instructions on how to use these to fill the cartridge so I did still make a mess the first time I used them but after I figured out where to stick that needle all was well and I get about a 110% fill (Pilot says that's okay) on the cartridge compared to the 50% I was getting before.
Awesome looking product. But really, it’s useless as a writing device. The ink goes everywhere. Do not load the syringe with ink. It comes squirting out. Even a little ink inside the syringe, still very easy for it to drop a huge glob and mess it up. Looks cute so I’ll keep it, but for aesthetic decoration