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Average Customer Review
 5.0 (1 customer reviews)
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  After trying this 0.5..., March 1, 2012
By smi...
After trying this 0.5 black Gel refill for the Ohto pen it is now my favorite. Until I discovered Jetpens I had been using the Uni-ball 207 0.5 (micro) cartridges (scavenged from 207 RT pen donors) in my Ohto pens. The G-305 produces a slightly darker black than the Uni 207's. Otherwise the performance is similar and the sealed metal cartridge is a plus compared to the plastic 207's. The only reason I would not use these would be cost as you can get a two pack of the Uni 207 Rt's for about $3 vs $5 each for the Ohto Gels.