Pentel Super High Polymer Pencil - 0.7mm - Medium Tip - 4H - Black For Pentel Mechanical Pencils - 12/TubeSuper high polymer refills are designed specifically for mechanical pencils. Patented manufacturing process provides greater lead strength, darker lines and minimal breakage. 60mm long. Assembled: No Lead Type: 4H Package Quantity: 12 pcs Country of Origin: Japan