FABER-CASTELL-Mix & Match PITT Artist Pens. This Mix & Match system makes designing with color simple. Choose a color set and medium that inspires you but feel free to mix and match as you create. Color coordinated palettes give you the freedom to design your project knowing the colors will work beautifully together. The odorless India Ink is waterproof; lightfast; and won't bleed through your pages. Perfect for all your design; memory; and craft projects! This package contains four Artists Pens.