The super polymer fine leads are extra break-resistant and deep black. Clean and easy refilling with the aid of practical refill tool.- Super-Polymer fine leads, 0.7 mm, for all popular mechanical pencils- Extremely break-resistant and exceptionally smooth- Deep black, intense lines- With filling aid for clean and easy lead replacement- Line width colour code- Available in 5 degrees of hardness: HB, B, 2B, H and 2H- Contents per box: 12 leads Features Quantity 12 Thickness 0.7 mm Hardness HB