This pack of 6 Winsor & Newton ProMarkers offers a range of useful mid tones. The inks are translucent enough to be overlaid and blended beautifully when still wet. The ink in these pens is alcohol-based, non-toxic and permanent, and can be used on a huge variety of surfaces, including paper, card, acetate, glass, metal, plastic, wood and more. The pens are dual-tipped, giving you opportunities for a huge variety of strokes using just one pen. - Ink transparency: Translucent - Product dimensions: 10.7 x 1.4 x 1.4cm (individual pen) - Brand: Winsor & Newton - Package weight: 127g - Colour: 6 shades included (Cool Grey, Cool Grey 2, Cool Grey 3, Cool Grey 4, Cool Grey 5, Black) - Ink type: Alcohol-based, non-toxic - Permanence: Permanent - Drying time (approximate): A few minutes (ink designed to be blendable while still wet) - Number of pens: 6 per pack - Tip type: Twin fibre tips (one broad chisel nib, one fine bullet tip) - Packaging may differ from that pictured