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Title: Fast drying gel. Smooth writing.
Review: Like another reviewer, I also purchased these to replace the cartridge in a S&W tactical pen. I really did buy this pen more to just have a nice pen than anything "tactical" about it. This made for an instant upgrade. The pen now writes much more smoothly and the ink dries super fast for gel. If you just bought a nice pen and it came with a junk cartridge, these are for you. If you don't like gel, I'm not sure these will change your opinion, though.
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