ANTI-SEIZE DESIGN: The tire valve stem caps come with metal shell and plastic insert, which will prevent the valve stem from corrosion, esspecially in wet/cold area. WIDE COMPATIBILITY: Our tire air caps are compatible with all American standard schrader valve stem. Include cars, SUVs, trucks, RVs, bicycles, bikes, and other motor vehicles. EASY to INSTALL: With the simple and smooth horizontal stripes design, DECURCAR valve stem caps are easily hand tightened or took off. LEAK-PROOF: Built-in One-piece sealing ring inside the plastic liner with leak-proof function. Prevent damage to the car due to tire leaks. FASHION APPEARANCE: DECURCAR valve stem covers are made of durable light-weight aluminum alloy with N2 nitrogen emblem laser-etched. These are stylish and fashion tire stem caps and when you have nitrogen in your tires it's a great alternative to the plastic green caps. Product Description