This is a 1.18mm diameter lead. The material is high polymer (highly refined particles). I believe it's the same material as Mitsubishi Pencil's Hi-Uni. It's very smooth. Many antique Montblanc and Pelikan pencils use 1.18mm leads, and I think many people are having trouble finding compatible leads. This will revive your antique pencil. ◆ Diameter: 1.18mm ◆ Length: 4.5cm ◆ Softness: 4B ◆ Quantity: 100 leads Enjoy the smooth writing feel. ※ Photo 1 is a sample. You will receive 100 leads. ※ To keep the price down, there is no dedicated case. The leads will be delivered wrapped in plastic wrap as shown in photos 2, 3, and 4. They have never been damaged before, so please rest assured.