Pentel EnerGel Pro Permanent Gel Pen

The Energel Pro Permanent, sometimes call simply the Energel Pro or Energel Permanent, is a variant of the Energel liquid gel pen that uses a permanent, waterproof pigment-based ink. The ink is quick-drying like that of all Energel pens, but it's also waterproof, fade-resistant, and fraud-proof. The Energel Pro uses the waterproof Energel LRP7 0.7
The Energel Pro Permanent is a variant of the Energel liquid gel pen that uses waterproof gel ink.

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Pentel EnerGel Permanent Gel Pen - 0.5 mm - Black

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Pentel Refill Ink - For EnerGel PRO Permanent Gel Pen, (0.7mm) Medium Line, Red Ink - LRP7-B - Yahoo Shopping

Pentel EnerGel Pro Permanent 0.7mm Gel Pen