The Molotow Burner Markers feature the infamous Burner Paint. This is same paint you find in the Molotow Burner cans. The Burner paint means these markers flow smoothly, are highly permanent and cover well on most surfaces. These markers feature a 20mm (almost 1 inch) T-nib which are replaceable. It also features a pump-action valve to help you easily regulate the flow of ink. REFILLABLE.