Pentel Super Hi-Polymer Lead Refill 0.5/0.7Mm, Fine/Medium, Hb, Pack of 6 (C257BPHB6) #1 selling lead in the world Each tube of Pentel Super Hi-Polymer lead is made of 100% recycled plastic and part of the Pentel Recycology line of products Pentel Super Hi-Polymer HB lead is equivalent to a #2 pencil, guaranteed to scan on tests, resists breaking and never needs sharpening Ideal for all general writing applications such as notes, letters, etc Refill Fits all 0.5mm / 0.7mm mechanical pencils Lead packaged in tubes for easy handling