High performance HB lead refills made with diamond-infused lead. Stronger, long-lasting material resists breakage to produce consistent vivid, dark lines and won't damage or smear documents. Compatible with most refillable mechanical pencils. Lead Degree (Hardness): HB; Lead Color: Black; Refill(s) For: For Most Refillable Mechanical Pencils; Lead Diameter: 0.5 mm.
High performance diamond-infused lead.
Stronger, solid material resists breakage.
Consistent vivid, dark lines.
Compatible with most refillable mechanical pencils.