I want to identify the following object left in the house from the previous owners. It looks like a door, but has a long groove, and two round holes. Furthermore, it has half-bullnose edge, and rounded corners. On the back there is a label, which says
Colour: F26 Run & N.C. Prog: 26A4-8 CNC Slot Location: C/O: 135016.075 Instance: SPR300720 License Plate: 135016.075 Cut Width: 29.000 Cut Length: 71.938 Smoke Developed Index Over 450 Inspections: Routing op Almex/Fritz Final inspection
According to my measurement the width and length are indeed 29in and 72in respectively, and depth is 1in. I would like to note that our house is in the United States, but the spelling on the label says "colour", British spelling.
The pictures are below: