Winsor & Newton Cotman 666 Watercolour Synthetic 1 Stroke Flat Brush is a flat wash brush suitable for applying washes of colour and creating firm, sharp edges. Great when lettering or painting straight edged shapes and urban landscapes. Long handle with a flat wash brush. The Winsor & Newton Cotman Brushes range is made from pure synthetic with two varying thicknesses of hair to make the perfect brush which retains point, strength, spring and colour carrying capacity. This economical range is the best range to carry an artist from student level to professional. To clean brushes, wipe clean with a lint-free rag and rinse under running water. Using mild soap and cool water, swirl the soapy brush in the palm of your hand and rinse. Repeat the process until water runs clear. Remove excess water, gently reshape bristles and leave to dry.