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. Vibration-isolated shelving for your gear Blok is a division of Monitor Audio , so they understand audiophile gear. They carefully crafted their Stax 2G modular rack system to eliminate performance-robbing vibrations This unit includes the Stax 2G Base, one Shelf 220, and two Shelf 170s. Vibration-absorbing silicone pads isolate each shelf from its supports. Need more dampening? The supports are hollow and can be filled with acoustically inert material like sand or shot for added mass and resonance control. You can also add more Stax 2G risers, up to the recommended maximum height of 43". What's in the Box: 1. 4 Shelves 2. 6 Shelf supports 3. 2 Legs 4. 4 Feet assmblies 5. Four M10 bolts 6. 4 Bolt caps 7. Assembly tool 8. Adjustment tool 9. Quick Start Guide