it was from Costco,
box shows 5/16
these were left over from when I did my house 8 yrs ago.
it has a hard bottom.
there is different material to put down on floor prep, I chose something similar to a very thin carpet, not the plastic to stop any clicking.
amazing how it changed the looks.
BB from California
2015 Ram 3500
2001 Cardinal
best friend is my wife 🙂