Montana ACRYLIC Marker Set Metallic EXTRA FINE 4pcs. Set 0.7mm. The Montana ACRYLIC Marker EXTRA FINE Set contains four ACRYLIC EXTRA FINE Markers 0.7mm. The Markers are packed in a reclosable transparent plastic box for a fast overview and comfortable handling. Single Markers contain water-based ACRYLIC paint, refillable, replacable tips.