Staedtler Mars Micro Carbon Leads

These smooth gliding leads produce jet black lines that are easy to erase if necessary. They are highly flexible and extremely break resistant and suitable for use with all mechanical pencils. Available in three line widths and up to four grades. 12 leads per tube.

0.3mm - B      H     2H
0.5mm - 2B    B    HB    H    
0.7mm - 2B     2H