Midnight, ink, raven, onyx, and noir--however you describe it, these spiral coils are as black as a moonless night. Black is a great color that works with any logo and brings a touch of professionalism and formality to your documents--black tie, anyone? Because of their versatility, black binding coils are one of the most popular among our 45 color choices. No matter the design on your cover, you can grab one of these black coils to bind your reports/ proposals and rest assured that it will not only fit your color scheme, it will work in your coil binding machine as well. If you're someone who likes your materials to look professional and polished, these black coils might be right for you. Because black is a neutral color, this will fit well regardless of the cover color that you choose. This coil will work great with all standard 4:1 pitch systems and is designed to spin easily through the holes of your book. Or for those who are conscious of the environment, eco-coils made from recycled materials are also available.