Faber-Castell Polymer Refill Leads Set for Mechanical Pencils, 0.5mm 2B, Black, 20 Leads per Tube, (Set of 4 Tubes + Free Eraser, Sealed in Blister Card) Faber Castell Refill POLYMER LEADS for mechanical pencils, Sealed in Blister Card Intense black lines, practical push cao for easy refilling 20 Leads in each tube, Lead of 0.5mm produces fine lines For general writing, Intense black lines, Practical push cap for easy refilling Create sketches, technical drawings and texts cleanly and precisely with the line width most suitable for the fonts