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Smooth ink flow. Color...
November 12, 2008
Verified Purchase
Smooth ink flow. Color of ink is identical to the color of grip on the UMN-138 RT blue-black pen. This refill is usable in the UMN-138 pen as well.
2 people found this helpful
tyleraspect
These are great refills....
February 11, 2011
Verified Purchase
These are great refills. Smooth, solid, and skip-free. They work in the Zebra dirfit jell pens too.
1 person found this helpful
brett.jianshi
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