ARGUMENTS

• intense black, blueprintable, easily erasable leads for writing, drawing, and sketching
• available in 14 grades of hardness: 6B - 6H
• lead diameter:
  6B - 4B: 3.15 mm diameter leads                            
  3B - 6H: 2 mm diameter leads
• blueprints: 6B - 5H
  microfilm: 6B - 3B
  roughened transparency: HB - 6H
• 133 mm long
• to fit 9400, 9500, 4600 clutch pencils
• 10 leads of one grade per container
• smooth surface (no dust produced by TK jaws)