Montblanc Leonardo Sketch Pen Lead 4B, 5.5 mm 07232About This Refill: This Original Mont Blanc Lead (07232) is recommended by the manufacturer to maximize the efficiency of the Mont Blanc Mechanical Pencil for flawless and consistent hand writing.Writing System: Leonardo Sketch PenRefills: Leonardo Sketch Pen 4B, 5.5 mm, 2 per pack