HB pencils, Happy Bots special edition. Assorted colours: white and green. Lead measures 2.2 mm Ø. Ergonomic triangular shape. HB lead is medium hard, making it suitable for writing and drawing. The lead creates a uniform stroke and is resistant to breakage due to its LPS (Lead Protection System) which strengthens the lead by sticking it to the wood. The wood is sourced from sustainable forests.