A set of professional double-sided sketching markers in a case. The body of markers is made in black or white. Two-sided markers: one side of the classical form, the second - beveled. The rod width is 1mm and 6mm respectively. Markers should be stored horizontally. Alcohol-based inks are non-toxic and won't damage the surface of the paper, unlike water-based markers. Sketches with these markers dry quickly on paper and become waterproof, acid-free. Markers are suitable for use on paper, cardboard, photographs, photocopies, plastic, wood, fabric, canvas.