#1 selling lead in the world Refill lead for 0.5mm/0.7mm/0.9mm Mechanical pencils Pentel Super Hi-Polymer HB lead is equivalent to a #2 Pencil, guaranteed to scan on tests, resists breaking and never needs sharpening Each tube of Pentel Super Hi-Polymer HB lead is made of 100% recycled plastic and part of the Pentel Recycology line of products Never needs sharpening and produces a clear, dark line