Las minas para portaminas son resistentes a la rotura por ser polimerizadas . Son de fácil recarga.
Pentel Super Hi-Polymer Lead Refill 0.7mm Medium HB 12 Tubes Staedtler Eraser
Minas de 0.7 mm. HB, 2 tubos
Pentel Super Hi-Polymer HB Lead Refills - 0.5mm, Pack of 12, Black : : Home & Kitchen
FABER-CASTELL SUPER-POLYMER FINE LEADS - Artemiranda
Pentel Hi-Polymer Super 0.7mm HB replacement leads for mechanical pencils
Faber-Castell 0.7mm HB Super-Polymer Fineline Lead (Pack of 12) : Artists Pencils : Office Products
1pc Staedtler 250 Mechanical Pencil Lead Super Fine Anti-cracking 0.3/0.5/ 0.7/0.9/1.3 2H/
Pentel Super Hi-Polymer Lead Refill (0.7mm) Medium, HB, 30 Pcs/Tube 3-Pk
Faber-Castell 0,7 mm HB mines fines Super-Polymer (3 paquets de 12) : : Fournitures de bureau
Super-Polymer fineline lead, 2H, 0.7 mm