Gates arrived the day after the order - is faster's really not. The bike adapter for my Presta valve I could accurately and indeed screw bombproof. During the subsequent pumping even the correct pressure has been shown to me. Also no air escaped from the side of the valve or the adapter. The black sealing ring held easily even with repeated screwing and unscrewing. Supposedly non-deburred places I've found in any of the 3 adapters. How it is possible that some people here have problems with the handling of my knowledge eludes. They probably have ordered wrong, unsuitable for their needs adapter or received Monday merchandise.
I tested the other adapter to corresponding valves and could really find anything negative. And I did not need a manual. The bill came via e-mail and PDF, so because of "no bill", everything was in perfect order.
And let's be honest, dear Returns whiners: Shipping fees are one before sending the order shown. Reading helps and hurts to fast clicking around. So do not howl, but next time Read more about what you ordered and at what price.
5 stars from me for the adapter and the brilliant price!
