These refills fit for crush metric, Pentel energel, Pilot G-2, Sharpie S-gel and Papermate Inkjoy retractable gel pen，which is impressively environmentally friendly.
High capacity and long lasting, provide smooth writing and ink intensity.
0.5mm, black ink, quick-drying without smudge.
Each refill has a little red tip on them to prevent ink from drying out.
Silicone oil sealed tube, plastic cap protect tip, so it will not leak anyway.
