24 markers per set. One set per package. Spectrum Noir pens are affordable, alcohol ink based markers for crafters, artists and students. Each pen is double-ended, with a fine bullet tip for detail work and a broad chisel nib on the other end for filling larger areas. The colors blend seamlessly, and can be mixed or layered over each other. Click here to open the Spectrum Noir Color Chart and view all colors. Tips: Store pens horizontally to keep tips evenly inked and help prevent one of them from becoming too "juiced" or leaking. Generic isopropyl alcohol works well for cleanup of stray marks on non-porous surfaces like table tops.