This embroidery thread kit includes 15 colors. The internal core is polyester, providing the thread exceptional strength and elasticity. Metallic needle is recommended, but not required. We've been testing this thread with regular 80/12 embroidery needle, and it still performed above all expectations. The color selection includes all gradual shades of gold, silver and bronze you may need. It also offers a variety of most popular holiday colors, so this kit is spectacular for spicing up Christmas designs and other festive projects.