The Aperta Support Plate can be affixed to any supporting surface to provide a larger surface area for the Aperta stands. These plates can be used to extend the size of the upper supporting surface of floor stands to accommodate the IsoAcoustics Aperta stands. Double-sided tape is provided to fasten the Aperta Support Plate to the supporting material, or the plates can be drilled and bolted into place. Care should be taken to ensure the supporting structure is stable enough to support the stands and speakers.Suitable for IsoAcoustics Aperta or ISO-L8R155 (sold separately)From the studio to the stage, Sam Ash Direct has you covered with the latest gear and accessories. With our many decades of experience and efficient order processing, your satisfaction is guaranteed!