Super Hi-Polymer Lead refills produce crisp lines of consistent darkness, smoothness and density in mechanical pencils. Proprietary lead formula resists breaking to prevent wasteful use. No. 2 lead accurately scans on tests and documents. Value pack contains 0.5mm and 0.7mm lead to provide a total of 180 pieces of lead. Lead is perfect for all general writing, including items to be faxed, photocopied and electronically scanned.