Auralex U-Boat Floor FloatersPack of 23Made of a specially-formulated rubber compound, U-Boat Floor Floaters are our proprietary U-shaped channels used to support framing members and float isolate and decouple them from the surrounding structure. With the help of U-Boats, a floated room features greatly improved transmission loss isolation and low frequency definition translated a tight, floated room will always sound better.U-Boats are the industrys most affordable floating solution and are much easier to use than those exorbitant pucks that have been used in the past. Specifications Size 2 18 wide x 1 12 high x 2 long Color Black Thickness sides516 and base12