Tesla 空氣閥蓋（蓋子）

I was a little skeptical about valve caps made of metal, but these zinc alloy ones haven't shown a speck of rust after a month of rain. They fit snug and look much better than the plastic ones they replaced.

Five months of salty winter roads and these still look brand new under the grime—the zinc alloy really holds up where aluminum caps on my old car would've gone chalky. Snug fit, too, no wobble or hiss at the valve.

These fit perfectly and don't show any signs of wear after a few weeks of rain. The zinc alloy feels much sturdier than the plastic caps I had before, and they haven't loosened at all even on rough roads.