These ProMarkers are alcohol-based, non-toxic permanent ink markers with professional quality dyes. The translucent colors can be blended for an almost unlimited palette, while single colors can be layered for added depth and shade. Each marker has twin tips; the fine nib for precise coloring and details and the broad nib for large color fills. 6-Marker metallic set includes iridescent blue, yellow gold, bronze, red copper, silver and pewter. Details:Includes assorted metallic colors6 dual-tip markersFine nib and broad nibSmooth, streak-free finishCan be applied liberally to paper without damaging the surfaceFor use on paper, glass, acetate, plastic, metal, textiles and moreCertified nontoxic and conform to standard ASTM D-423