Amazon.com: Tombow 56198 Watercolor Set. Includes Dual Brush Pens, Water Brush, Blending Palette, Guide, and More. Perfect for Beginner Watercolor Art!
How to Paint like Bob Ross Using Dual Brush Pens - Tombow USA Blog
Tombow Dual Brush Pens- Pastel Set of 10
Amazon.com: Tombow 56149 Dual Brush Pen Art Markers, 96 Color Set with Desk Stand. Blendable, Brush and Fine Tip Markers with Stand