Las minas para portaminas son resistentes a la rotura por ser polimerizadas . Son de fácil recarga.
2 packs of 12 Mechanical Pencil Lead from Pentel - 0.5mm HB Super Hi-Polymer - Simpson Advanced Chiropractic & Medical Center
Pentel® Super Hi-Polymer® Leads, 0.7 mm, HB, 12 Leads Per Tube : Office Products
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Refill Lead 0.7 Hb (12) — GITZ Office Supplies
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