Montana Acrylic Markers feature brilliant water-based, pigmented, acrylic matte colors that are compatible with and match the colors that are available in the Montana Gold spray paint range. The optimum flow control pump valve system allows accurate handling and application. The ink is lightfast, water-proof and abrasion-proof allowing application to almost any surface including canvas, wood, metal, walls and glass. The ink is also ideal for brushwork and airbrush. Details:Available in multiple colors15 mm standard nibACMI approved and AP nontoxicUV resistant and light fastCompatible with Montana GOLD spray paintIdeal for indoor and outdoor useRefillable with replacement tips available