http://www.furniturerig.com/item/14771/pentel-energel-retractable-05mm-liquid-pen-refill/ Pentel of America, Ltd. Pen & Ink Refills PENLRN5A Refill is designed for use with the Pentel Retractable EnerGel Liquid Gel Pens. Vivid, acid free ink dries quickly.Packaged Quantity 1 EachProduct Type Ballpoint Pen RefillPoint Size 0.50 mmTip NeedleInk Color BlackInk Type GelCompatibility Pentel Ballpoint Pen EnerGel Retractable AcidfreeQuickdrying InkRecycled NoRecycled Content 0%Postconsumerwaste% 0%Assembly Required No
