Super Hi-Polymer Refill Leads 2B 0.5 mm tube of 12 $0,92 favorite_border Pentel 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. See at Misterart See all Pencil Lead and Refills