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. Isolate and protect These Pangea extra-large Sonic Saucers serve two functions. The 1-1/2" diameter discs were made for heavy audio stands. They distribute your stand's weight evenly over a larger area, and their smooth bottom surface won't leave indentations on wood or vinyl flooring. And the Sonic Saucers also help isolate the gear inside your cabinet from unwanted vibrations transmitted through your stand's feet. The saucers come in a four-pack, and each disc can support up to 100 lbs. A small indentation in the saucer's center holds a spike or cone-pointed column securely. A great match for Pangea Audio racks and stands . . What's in the Box: 1. 4 Isolation discs