These measure 1/2" x 14" x 18". They are drilled and tapped to accept both Minn Kota RTA 54 quick release mounts and/or Rhodan Gen 1, 2 and 3 quick release mounts. Comes with a 1/2" x 6-3/8" wide  x 7" long powder coated back plate and extra stainless steel hardware. These are reversible to fit both PORT or STARBOARD mounting applications. Available in gloss white or gloss black powder coat.