Marsmicro refill leads are perfectly adapted to the automatic pencils. Fit the lead tube into the open barrel of pencil, invert tube and the pencil is filled. Your hands never have to touch the lead. These leads are designed for use on paper and art board. Marsmicro leads are extremely break resistant and are available in up to 8 degrees of hardness B, 2B, HB, H, 2H, 3H, F and 5 line widths - 0.3, 0.5, 0.7, 0.9 and 1.3mm. Each tube contains 12 leads.
