Fits snugly. Raises the tank just enough for the sensor. Well made. If tank base is well painted when installed, should prevent rusting.
Better stability than no base support at all. Compared to several other manufacturer's products, this was not as wide but those other products kept hitting my leg when I lugged the tank around. I'm happy with my purchase for that reason.
It is very difficult to set a propane cylinder down evenly. Usually an edge of the bottom rim contacts at one place and knocks off some paint and likely bends the rim. This "Tank Tire" inserts without tools or fasteners inside the rim where it is securely held. The "Tank Tire is slightly deeper than the rim and it quietly contacts the floor with a firm rubber-like material. The cylinder stays new looking and doesn't leave rust stains on the surface it is placed upon. This is a sturdy item that will last for many years