The Pilot V7 cartridge system is the world's first refillable liquid ink needle tip rollerball pen. Delivering a smooth and precise writing performance, these pens have a Hi-Tecpoint tip for precise, clear writing and a visible ink level to ensure that you can clearly see when to refill it. To help you do your bit for the planet, these pens are refillable and made from 71% recycled plastic. This pack includes 10 black medium line pens.