With its unique 3-in-1 design, Spectrum Noir's TriBlend Markers are a true break-through innovation for coloring. Inside each marker, there are three separate ink chambers, each feeding through to a fine-bullet nib, so you can experience three colors inside a single alcohol marker for the first time. When used together, these colors will combine to give you a seamless, controlled blend each and every time. This 8x6x2 inch package contains 24 tri-blend markers in assorted colors. Conforms to ASTM D 4236. Imported.