Ordered these for a missing cap and spares for the future. These thread on further inside the cap than typical stem caps. Protect a lot more of the valve stem and look great. Went ahead and replaced them all, with plenty of spares.
Pros
Glade they put a liner in the cap. Helps prevent rust from forming on the valve.
Cons
The silver color may attract unwanted attention or theft, particularly in areas with high rates of vehicle or bike theft