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Amazon.com: Pentel BL77-CO Energel XM Retractable Gel Pen with 0.7 mm Tip, 0.35 mm Line Width - Blue, Pack of 12 : Office Products
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Amazon.com: Pentel EnerGel XM BL77 - Retractable Liquid Gel Ink Pen - 0.7mm - 52% Recycled - Pack of 7 : Office Products
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Pentel EnerGel XM BL77 - Retractable Liquid Gel Ink Pen - 0.7mm - 54% Recycled - Purple - Box of 12 - Walmart.com
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Pentel BL77-S3X gel rollerball EnerGel BL77 with pressure mechanism, 0.7mm, 1 piece, dries lightning fast, no smudging
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