Solid heavy brass
"real" porthole for professional installation where a real
porthole window is required.
For use in a building or house or ship exterior wall. Seals
weather tight when shut and dogged down.
Unit is as you see it, surface mount ONLY. Flange or wall
filler has to be fabricated by the installer, but the unit will
seat and seal in a properly cut hole in a wood or metal wall or
bulkhead.
