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This refill is usable...
October 23, 2008
Verified Purchase
This refill is usable in UMN-207 Micro, UMN-152, UMN-105, or UMN-138. I tried it in an UMN-138 pen body from Jet Pens and it works well. It writes smoothly; no flaws from what I can tell.
tyleraspect
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