High-quality HB-grade lead is strong and durable. With every stroke, it produces consistent marks and reliable results across a wide range of media. These dependable refills are highly recommended for Tri-Grip, Aspire, Clickster and additional Paper Mate pencils sold separately. Lead Degree Hardness: HB Lead Color: Black Refills For: For Most Refillable Mechanical Pencils Lead Diameter: 0.7 mm.