This is a very effective set of stainless steel (with some titanium) isolation cones and feets that will decouple your audio unit and greatly reduce harmful vibrations by dissipating them through the cones. They are sold in sets of three and each set will hold up to 220lbs of weight. Typically, when you order from the factory, it will take 1-3 weeks for delivery but you can get one set here immediately.
Cone: 2″ diameter x 0.75″ tall
Foot: 2 7/16″ diameter x 0.5″ tall
Total height when used together: 1.11″