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. Stack on some more storage The Salamander Designs Synergy System SNRX lets you add an open shelf on to select Synergy System cabinets . It features anodized aluminum posts that attach firmly to the tops of your cabinet's posts. The riser can support up a TV up to 50 weighing up to 200 lbs. An open compartment below offers additional storage. Note: This riser is not designed to be used as a stand-alone cabinet. What's in the Box: 1. Shelf 2. 2 Rear-panels 3. 6 Posts 4. 6 Connectors 5. Assembly Instructions