These valve stem caps are made in the U.S. from once-fired American-made 40 caliber rounds. Obviously they don't have any live primers, powder, or any explosives, so they're completely safe to use.

These valve stem caps feature sparkling rhinestones and are made of ABS plastic, coated with polymer clay. The inside of the cap uses a rotating thread structure so it fastens tightly to the valve ...

Almost all bikes will come with standard, mass-produced plastic valve caps. But what if you want to stand out or lighten up a boring element of your bike.

Fortunately, most valve caps are designed to be one-size-fits-all, so there’s usually no need to search for a specific cap for your vehicle. However, if you want to be extra certain, consult ...

My Renault Megane has a tyre pressure monitoring system (TPMS). Recently it alerted me that one tyre had low pressure but when I removed the plastic valve cap I was shocked to see sections of the ...