#1 selling lead in the world Refill lead for 0. 5mm/0. 7mm/0. 9mm Mechanical pencils Penndel Super Hi-Polymer HB lead is equivalent to a #2 Pencil, to scan on tests, resists breaking and never needs sharpening Each tube of Penndel Super Hi-Polymer HB lead is made of 100% recycled plastic and part of the Penndel Cycology line of products Never needs sharpening and produces a clear, dark line