Royal & Langnickel Essentials Aqua Flo Plastic Refillable Brush Pens, Sizes 4, 7, 10.

MULTI-SIZE BRUSH TIPS -Featuring 3 round brush tip sizes: 4, 7, and 10, with a brush pen measuring at 7.125" built to effortlessly lay in your hand. Each brush pen has a soft, supple tip made of durable brush fiber. Use the tip's tapered point to create thin lines. Brush down for thicker lines and strokes. A unique way to create delicate watercolor effects, or, use without water for dry-brush painting, sketching, coloring, calligraphy and so much more.