These are for making great ice cubes in your boat freezer.
They are stainless steel and have a lip on the open end for hanging them on the expansion plate or other ledge in your freezer.
One of them has a broken plastic divider but these does not see to matter as the cubes all slide out with the full divider when you let them warm slightly or run water over the tray (which is the normal way to get the cubes out).
Similar trays from Seafrost sell for $95 per pair.
You can have these for $35 for the set plus shipping or pick up in Melbourne, FL.