This is the worst carpet chair mat. There were no identifying tags on the mat. I have a flat pile carpet I think chair kept getting stuck in the divots I would have to raise my bottom and pull the chair out of the divots to be able to move it. Retrieved my old mat and put it back with cracks and all.
Order was received quickly & in excellent condition. Extension goes into knee hole plenty far. Mat works quite well enabling me to move my office chair as needed without worrying about tearing up carpet. It also moves MUCH easier!
I did not buy the Carpet Chair Mat for my floor. I used it to stop water from getting into my house from the pool area during recent heavy rains. It was excellent for that purpose.