Review on 🚴 Schwalbe SV17 Presta Extra Long Valve 700C Black Inner Tube - 28 Inch by Schwalbe by Francisco Garcia

I bought 2 of these last year and am installing them now. I wish I had checked them out sooner. One has a leaking valve core. I tried to tighten a little, checked with soapy water, the flow did not stop. I ended up lubricating the valve core threads with liquid Teflon sealant. Let's see how long this lasts. I'll try other tubes and see if I have better luck. I am very disappointed with the quality control.