Junk. Very cheaply made. Rubber tubing is very cheap. What is the weakest point in the vortex. it will break 3 pounds less than the other two gauges that read the same thing. One of them is an expensive calibrated sensor. It's easy to read, but the rubber hose will degrade over time and all the connections look very cheap. I would not trust this product nor would I recommend it. Without naming any brands, I bought another one without a rubber tube and it cost about $21. It's very accurate and much better done. This is the actual review today, April 2, 2021.