Review on 10-Pack Black MTB Presta Bike Bicycle Road Racing Coloured Valve Cap Dust Covers - High-Quality Metal Anodized Aluminum Alloy, French Style Tire Accessories by Ronald Orear

More than half of the valve stem caps were not screwed on properly and would not screw into my wheels. If you decide against the advice and buy this item: Check each cap as you receive it. Don't install two and hope the rest will work in your pocket when you need them. When installing, I recommend turning counterclockwise a few times to properly tighten the threads before fully tightening. These caps are easy to break threads. The few that worked look good. Not the update I would get. When they run out, I buy a small backpack at the bike shop. I refunded my money for this poor quality product. Thank you Rewin!