Review on Continental Presta Valve Black 25 32Cc by Paul Andrews

Not that I didn't like it, it was defective. The cause of the inexplicable loss of air could not be found. Place the fully inflated tube underwater without showing where the air will exit. Reassembled and an hour later the tire went off again even without using it. I was delighted when I saw a replacement was on the way until I saw it wasn't a 700x25 so I canceled it otherwise I would have happily received it. So here I am without a new tube replacement and with a defective tube. 06/04/2020 Continuation. Since I canceled the exchange and decided to check the air leak carefully. I increased the inflation to the maximum and re-immersed the hose. Miraculously, the defect was at the base of the valve! A very small, almost microscopic hole. I bought another tube and so far so good. Of course they refunded my first purchase.