The Montana Black Dye Ink Marker has 9 alcohol based, permanent and uv resistant dye ink colors. The new Montana black dye ink is a low-viscosity ink. Each marker is filled with 20ml of dye ink. The ink is delivered through the marker‘s felt tip by a refillable pump system valve and can be applied to almost all surfaces. All markers in the Montana Black Dye Ink Marker range are fully refillable and the tips are also replaceable. It‘s available in a 15mm Standard tip, an 8mm Round tip, and a 10mm Chisel tip.