Deck Vent, Century Sea Maid, 1:6 Scale
Designed from actual Sea Maid part, for use on 1:6 scale models.
Available in Frosted Detail plastic (requires clean up, and finishing with available "chrome" paints);
or in brass/bronze (raw/unpolished, polished, or Rhodium plated brass). Rhodium is a good substitute for chrome.
Brass seems to be a bit softer than bronze, but both can be polished well, and can be plated with home plating kits, such as brush-on Nickel.
Cross bar must be removed by the modeler.