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. Expand your Solidsteel VL rack This high-quality shelf kit is made for the Solidsteel VL-series racks . The shelf is made of vibration-dampening MDF (Medium Density Fiberboard). It comes with six 8-13/16" aluminum pillars for support. What's in the Box: 1. Shelf 2. 6 Poles 3. Hardware Manual