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Amazon.com: Pentel EnerGel NV Gel Ink Pen, (0.5mm), Fine Point Capped, Needle Tip, Black Ink, Box of 12 (BLN25-A) : Office Products
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Amazon.com: Pentel 0.5mm EnerGel-X Retractable Liquid Gel Pen with Needle Tip and Violet Ink, Box of 12 (BLN105-V) : Office Products
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