This fine-point pen features waterproof, quick drying pigmented ink for permanency and true color reproduction. Ideal for graphics, drafting, illustration or even accounting! Experience smooth, skip-free writing and crisp ink colors that leave consistent lettering and lines every time. Details:Available in multiple colors0.5 mm nib sizeChemically stable and fade resistantWill not smearArchival and acid freeBleed proof on most papersAcid freeAP certified