Exactly what it says in the title: a top grill for a Sub Zero Classic 36 inch Refrigerator or Freezer (CL3650). This appears to attach to the top of the appliance with the appropriate screws (NOT INCLUDED).  They have an interesting spring-loaded latch mechanism to allow easy access to whatever machinery is hiding behind it.  These grills are completely unused and never installed.  They even have the protective plastic still attached. Please make sure they work on your particular appliance before buying.

I'm not sure how I got these. Just get these out of my storage so I can put more surplus in there.

Last 3 pictures are the grille's measurements.