Yasutomo Haboku Artist Brush with Natural & Snythetic Bristles, 5/16 by 1 7/16 inches, Bamboo Handle (6060M) Haboku Sumi stroke brush Inner stiffer hairs gather to form a tapered point Outer softer hairs have amazing water-holding capacity Hair structure ensures fluidity as well as dynamic strokes Measures 5/16 by 1-7/16 inches