Good quality, not so good quantity.
I expected a SET, I recieved ONE VALVE!
It's okay, it may have been partly my fault for not paying attention to the ad.
That being the case, this was $18 for one valve, and I can get good valves for $5.99 each.
That's why I expected that for this price, I was getting a set of (4) valves.
Always read these ads very carefully and ask the sell questions.