Review on Masters 8002 AM2 Extenders Covers 2 by David Batte

This item was purchased some time ago. 2013 It's finally time to replace the others I had on the truck. Tried one, couldn't get pressure readings, tried another, same problem. Took a discount tire to try again, they tried replacing the valve core. Then they exited the valve core. They were faulty, I tried to get a claim but got no response from the seller. I will try to find and contact the manufacturer. This is the first negative item I've bought from Revain. I am very disappointed that the seller has not responded and I assume this will not resolve the situation.