Keytech is a company that makes very unique 3D printer filaments, as well as custom made filaments for companies looking to print objects with particular characteristics. They offer one filament that allows people to mix their own colors by taking 2 separate 1/2 strands and combining them to create the new color combinations. Their other materials have reduced shrinkage, less moisture absorption and greater flexibility. Read and see more at: http://3dprint.com/16656/keytech-3d-printing-filament/