The Montana ACRYLIC EMPTY Marker 30mm is a high quality manufactured refillable empty marker. The optimal flow control pump-valve system allows for precise handling and application. Transparent marker bodies allow for easy evaluation of the remaining marker content. Replacement tips are available separately. Perfect to use with Montana 180ml or 25ml water-based ACRYLIC PAINT. For optimal performance, we recommend using only Montana ACRYLIC Paint Refills with empty Markers. Screw left to open!