Amazon.com : Kuretake ZIG Clean Color Real Brush Marker, 24 Colors with Flexible Brush Tips, Watercolor Pens for Painting, Drawing, Calligraphy and Brush Lettering for Artists and Beginner Painters, Made in Japan :
Tombow ABT Dual Brush Pen | Pen Store
Tombow ABT Dual Brush-Pen, Single markers | Markers N Pens