These refill bottles feature brilliant water-based, pigmented, acrylic matte colors that are compatible with and match colors available in the Montana Gold spray paint range. In addition to being ideal for refilling Montana Acrylic Markers, they also offer a wide variety of possible techniques including airbrushing, mixed media and brush applications. The acrylic ink can be applied to a variety of surfaces such as canvas, wood, glass, walls and metal. The bottles are transparent for easy color recognition and assessment of remaining content. Details:Shock Black180mL bottle size6 bottlesHighly pigmented, water-based inkIdeal for indoor and outdoor useUV-resistant and weatherproofNontoxic, ACMI approved