As a former professional bartender with 20 years of experience, I can say these are professional qualities. They fit well and don't leak. They come with long caps that cover small openings and short caps that only cover the tips. (Use the long ones for less-used spirits or bottles; the short ones are fine for everything else. But basically, you get a replacement for any fountain pen.) Black rubber (or whatever) complements stainless steel and is flexible, and stainless steel will keeps its beautiful appearance. I am very happy that I received them and will buy them again.
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