Super Hi-Polymer Lead produces crisp lines of consistent darkness, smoothness and density in 0.9mm automatic pencils. HB hardness is equivalent to a No. 2 pencil, and is excellent for all general writing, including items to be faxed, photocopied and electronically scanned. 0.9mm thick lead is perfect for young writers and first-time users of automatic pencils. Each super-strong lead writes as far as an entire wooden pencil and produces a clear dark line. A 30-piece tube is equivalent to 30 wooden pencils.