This embroidery thread kit includes 4 cones in same (Purple) color. This is the most frequently used metallic color, so this quantity is very reasonable.
The internal core is polyester, providing the thread it's 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.
Overall, metallics can add a lot of "spark" to almost any creation, so it's a must to have a good collection of metallic thread in your stash. Even too simple designs can often look spectacular with a proper use of metallic thread. Sometimes it's just what is missing to make a good looking item be fantastic.