Create sketches, drawings, and layouts that last by this artist pen, which has a nib size of 0. 7 millimeters It uses odor-black pigmented India ink for -performance while providing the comfort, control, and convenience of modern disposable pens Rely on permanent ink for excellent lightfastness and a waterproof, acid-, and pH-neutral formula that works well for archival projects This artist pen doesn’t smudge to ensure quality results 1 piece per package