Style:3 Pack | Size:0.7mm Needle | Color:Violet<br>EnerGel RTX retractable liquid gel pen (0.7mm) needle tip, medium line, Violet ink 3-pk Pentel Co., LTD. Is a privately held Japanese company which produces stationery products. The Name is a combination of the English words pen and tell. Pentel is also the inventor of non-permanent marker technology.