Pentel Lead Refills 0.5mm RED (4pcs.) + Blue (4pcs.), 12 Leads per Tube Go to amazon.com Related posts 11 best 0.5 lead blue for 2022 FeatureSuper Hi-Polymer LeadLength 60 mm.Strong and resilientExcellent densitySuper SAVE with Pack of 8 DescriptionFits all 0.5mm mechanical pencils, 0.5mm lead produces fine lines