FIX WHAT YOU HAVE
GRAY PORT HOLES ARE THE BEST OF THE PLASTIC PORTHOLES, AND IS EQUAL TO SOME METAL PORTS, BUT BECAUSE OF THE 7"x15" PORTS IN THE MAIN CABIN, YOU'LL FINE NONE TO ACCOMODATE THE OPENING EXACTLY, SO IF THE DOGS ARE CRACKED OR THE THREADS ARE CORRODED, OR IF THE GLASS IS FROSTED OR CRACKED, YOU'RE BETTER OFF REPLACING THE DETAILS, BOMAR SELLS GRAY DETAILS AND ASSEMBLIES, J.S.I. SOMETIMES HAS SALES ON THESE PORTHOLES.