This light gray 6' x 5" keel hull guard helps protect against abrasions, scratches and scars. For boats 15' - 16'! Compatible with both fiberglass and most aluminum boats, it safeguards your precious investment. Thanks to an exclusive 3M adhesion system, applying your keel guard is as easy as prep, peel, stick! With no mixing or curing required, you'll finish the job in an hour.