Review on 🚗 Enhance Tire Safety with SAMIKIVA Brass Rubber Seal Valve Stem Caps - Universal Fit for Cars, SUVs, Bikes, Trucks, Motorcycles - Dust Proof Covers for Ultimate Protection (Silver, 8 Pack) by David Alvarado

I had an air thief who thought it was funny to blow air out of my tires and steal tires. Until those caps deflated and no one stole them! I have them on both my cars so we'll see if the air thief keeps blowing air out of my tires. I see that they are good brass. Simply lubricate the threads with silicone grease to keep them from rusting from road salt in winter.