A little water is all you need to dissolve the colors

In this package you get 15 standard tips (bullet-tip)

The colour is adapted for use on both paper or cardboard

or expressive art using drips and splashes

these markers are ideal for a wide variety of surfaces like stones

montana empty marker 15mm standard tip Molotow Sketcher Twin Marker A little water is allThe Montana Empty Marker 15 mm is a refillable marker with a specially optimized valve system and pump mechanism for smooth, controlled ink flow. It works with all Montana inks and paints, and comes with a replaceable 15 mm tip and mixing balls to keep your colors consistent. Delivered empty, its ready to be filled with your preferred ink or marker paint.