Mechanical pencil leads
Art. no. 250 03/05/07/09-... (degree)
The neck of the lead tube is simply inserted into the end of the mechanical pencil - all twelve leads can be filled into graphite 760, Mars micro 775 or graphite 779 in one go!
ISO colour coding
The identical colour coding of mechanical pencils, mechanical pencil leads and technical pens facilitates recognition of the different line widths.
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