for Uni-Ball Jetstream 4 & 1, Extra Fine Point Roller Ball Pens Refills -0.7mm Ball Point-Black/Blue/red/Green Ink +Diamond Infused Leads [Nano Dia-40 Leads] 0.5mm Hb Value Set
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for Uni-Ball Jetstream 4 & 1, Extra Fine Point Roller Ball Pens Refills -0.7mm Ball Point-Black/Blue/red/Green Ink +Diamond Infused Leads [Nano Dia-40 Leads] 0.5mm Hb Value Set
It is a set of the spare Refills &Leads made specially for those who own Jet Stream 4 & 1.
Keep in mind that it does not fit normal Jet Stream.
It is smooth and they are a spare lead which cannot break easily, and the profitable set which attached Nano Daia (hot product of Uni) together.(HB 40 Leads)