Yasutomo Haboku Artist Brush with Natural & Snythetic Bristles, 9/32 X 1 1/4 inches, Bamboo Handle (6060S) 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 9/32 by 1-1/4 inches