Pentel Premium Hi-Polymer Lead, 0.5mm, Fine, B, 12 Pieces/Tube, Box of 12 (C525-B) #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 0.5mm lead produces crisp, fine lines for intricate details Ideal for all general writing applications such as notes, letters, etc Refill Fits all 0.5mm mechanical pencils Lead packaged in tubes for easy handling