From Pentel these automatic pencil refill leads come secured in their own sturdy case to ensure the leads are held safe. Each tube contains 12 leads that work with all Pentel automatic pencils. With a slow wearing lead formula, these refills keep their fine 0.5mm point when in use. - Tube of 12 leads - Lead width: 0.5mm - Ideal for paper, tracing and drafting media - Extra strong, slow wear rate, dark colour - Suitable for all Pentel automatic pencils - Hardness: HB