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 lead piece writes as far as an entire wooden pencil. A 30-piece tube is equivalent to 30 wooden pencils.