Pentel EnerGel Alloy RT Roller Ball, Retractable, Gel Pen (BL407LS-A)
EnerGel Alloy RT Premium Liquid Gel Pen (0.7mm) Aquamarine Barrel, Black Ink 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.