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It stays on valve stems. Replaces the valve stem covers.
Sorry, there was a problem. Please try again later.These are "Smart" valve stem caps that constantly monitor your tire pressure so you leave them on all the time. If you don't want to monitor your tire pressure constantly just go to the auto parts store and buy a tire pressure gauge.
Sorry, there was a problem. Please try again later.I install it permanently. There is a locking security nut, but I just install it without it. Had it beginning of the year and I just changed the battery couple days ago.
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