It doesnt matter if I mount it so the set screw is on the top or bottom. They don?t sell an 11 on Amazon but Nordstrom did son I ordered those. all fell off somewhere never to be seen again. ), Japanese sobakawa pillows, gel, air bladders, memory foam, you name it, I have tried it. 5 and a 7 and I ordered the 7s. Durability4. My other complaint is that the flat piece that goes against the wall above the doorframe could discolor your wall. But solid one the car windows It toppled over at one point for me and I had to remove stuff. As described by the seller.