These fine line pens are ideal for art, crafts, sketching and drawing. They are quick-drying and smear-free, with long metal tips and are ideal for use with rulers, templates, and stencils. The ink is erasable when used on drafting paper, and will not bleed when highlighted. The pens can be left uncapped for 18 hours without drying up. Permanent, lightfast, waterproof ink, Ink dries quickly and is smear-freeDetails:Black8 pensPigmented inkPermanentWaterproofLightfastSmudge proofQuick drying inkAcid freeContents:0.05 mm pen0.1 mm pen0.3 mm pen0.5 mm pen0.7 mm pen1 mm pen1.2 mm pen1 chisel tip pen