ProMarkers and Promarkers Brush are alcohol-based, non-toxic permanent ink markers. The neon and metallic markers contain water based pigmented ink. The professional quality dyes provide for a smooth, streak-free finish and can be applied liberally to paper without damaging the surface. Great to use on a wide range of other 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 fine or brush nib and the broad nib for large color fills. Certified non-toxic and conform to standard ASTM D-423. The 24-Color Mixed Marker Wallet Set contains 12 ProMarkers, six BrushMarkers, three metallic markers and three neon markers:Tulip Yellow, Orange, Poppy, Carmine, Purple, China Blue, Duck Egg, Marine, Pear Green, Chestnut, Warm Grey 4, Black, Sunflower, Firebrick, Wild Orchid, Egyptian Blue, Ocean Teal, Saddle Brown, Egyptian blue, ocean teal, saddle brown, Gold, Red Gold, Silver, Electric Pink, Glowing Green, and Luminous Yellow.