Winsor & Newton Watercolour Markers are highly pigmented, lightfast, water-based pens. They deliver the performance Winsor & Newton Watercolour with the added precision of a pen. These watercolour markers are twin-tipped; they have a flexible brush nib that provides thickness (and a traditional art feel) and a fine nib for extra detail. The markers provide excellent washes when used with a wet brush, leaving little or none of the original mark if desired. The colours of the markers match those of the Winsor & Newton Cotman range. The marker pens are intermixable with all Winsor & Newton Watercolours and Watercolour Mediums. For best results, use with a watercolour paper.