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Amazon.com : STAEDTLER Mars Micro Carbon Mechanical Pencil Refills, Tube of 12 0.5mm, Pack of 12 Tubes, 2B Soft Fine Point Graphite Leads, 250 05-2B : Office Products
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Amazon.com : Pentel® Super Hi-Polymer® Leads, 0.5 mm, 2B, 12 Leads Per Tube, Pack of 3 Tubes : Mechanical Pencil Refills : Office Products
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