Cello Mechanical Pencil Leads | 0.5mm | Pack of 10 Tubes – A pack of 10 tubes of 0.5 mm mechanical pencil leads designed for use in standard mechanical pencils. Each tube contains fine 0.5 mm HB leads that deliver smooth, precise, and consistent writing and drawing, ideal for school, offices, exams, technical work, and everyday note-taking. The leads are break-resistant and reliable, providing long-lasting performance so you have plenty of refills on hand for extended use.