These Brush Markers are alcohol-based, non-toxic permanent ink markers featuring the same professional quality dyes, allowing for a smooth, streak-free finish. Great to use on a wide range of surfaces, including glass, acetate, plastic, metal, textiles and more! 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 brush nib for fluid strokes and variable line width and the broad nib for large color fills.