Faber-Castell Goldfaber Sketch Dual-Tip Markers - Sketch markers - Dual-end design with brush tip and fineliner tip - Alcohol-based, acid-free, smudge-proof ink - Ideal for sketches, drawings, and illustrations From drawing detailed figures to capturing brilliantly vibrant landscapes, Faber-Castell Sketch Markers provide a range of color-coordinated palettes for full color sketching. The markers dual ends offer optimal flexibility. Use the soft, flexible brush tip to achieve painterly strokes and the metal-wrapped 0.4 mm fineliner tip to define contours and precise details. The alcohol-based ink dries to a permanent, pH-neutral, acid-free finish that s waterproof and smudge-proof. In an effort to minimize environmental impact, the markers barrels and caps are manufactured from 100 recycled plastic. AP Certified.