4 TUBES: Pentel Super Hi-Polymer Refill Leads 0.3 mm HB no. 300

These Refill Leads fit the complete range of Pentel Mechanical Pencils. The composition of the hi-polymer lead is synthetic resin, graphite, and carbon, which give a very strong and flexible lead.Each tube contains 12 leads.4 TUBES: Pentel Super Hi-Polymer Refill Leads 0.3 mm HB no. 300