Amazon.com: Yasutomo Origami Brush Hake with Metal Ferrule Sheep Hair 1 3/8" wide
Rosco Iddings Brush 1/4" Ferrule Width, 1 1/2" Bristle Length | Full Compass Systems
ARTEZA Arteza Watercolor Set, Brown Brush Hair, Silver Ferrule with Silver Wooden Handle and Black Printing- 12 Pack in the Craft Supplies department at Lowes.com