Goldfaber Sketch Markers contain alcohol-based, dye stuff inks that are fast-drying, water-resistant, smudge proof, acid-free, pH-neutral and permanent once dry. Colors blend easily without streaks. Layer colors to achieve opacity and create stunning gradients, transitions or 3D effects. The sustainable and versatile sketch markers contain dual tips – a soft, flexible brush nib for vast coverage with variable line widths of 1-5mm on one end and a metal-encased 0.6mm fineliner tip for contours and details on the other. The caps and barrels are made of 100% recycled plastic and the product comes in recycled cardboard packaging. Designed for artists, loved by all: Goldfaber Sketch Markers are ideal for users from the fields of design, fashion, architecture, comic, manga and anyone who loves to add a touch of creativity to their everyday life. Perfect for all skill levels from beginner to expert, this 12-count set includes just the right number of colors to start a collection.