These measure 1/2" x 12" x 16". They are drilled and tapped to accept both Minn Kota RTA 54 quick release base mounts and/or Rhodan Gen 1, 2 and 3 quick release base mounts. Comes with a 1/2" x 6" x 6" powder coated back plate and extra stainless steel hardware. These are reversible to fit both PORT or STARBOARD applications. Available in gloss white or gloss black powder coat.