<http://schema.org/description>
"Install this flat metal backing plate to the inside of your Sunfish transom to ensure that your rudder gudgeon can be securely mounted in place.Plate measures 2.5 in. x 5 in. x 3/16 in..  Does not work with Sunfish built before 1972."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.apsltd.com/internal-backing-plate-for-rudder.html>