This item is provided by Crutchfield.com and includes free phone technical support for the life of the product. Details on how to take advantage of this service will be included with your package. Should you have any issues locating information on how to contact Crutchfield Technical Support, please contact this website's Customer Service department. Add more storage and stability The Pangea Audio Vulcan audio rack was designed for modular expansion. When you add a new component to your system, simply add another shelf to your rack. This add-on shelf also provides an increased level of vibration elimination. It's made of 3/4"-thick vibration-dampening MDF coated in scuff-resistant vinyl. The 7-inch steel posts help to further minimize unwanted vibrations. And they're stabilized by steel crossbraces. What's in the Box: 1. Add-on shelf 2. 4 Support tubes 3. 4 Braces 4. 4 Bolts 5. Assembly Instructions

This product can expose you to chemicals including Formaldehyde, which is known to the State of California to cause cancer or birth defects or other reproductive harm.  For more information go to http://www.p65warnings.ca.gov