Parts Express Speaker Mounting Top Hat 1-3/8" Tripod Stand Steel For use with 1-3/8&quot; (35mm) diameter tripod speaker stands Constructed of 0.12&quot; (3.0mm) thick steel for reliability, durability & safety Includes mounting hardware Requires 1-5/8&quot; cabinet hole cutout Depth: 3-1/2&quot;, Plate width: 4-5/16&quot;