One-piece laser welded body for maximum protection and precise operation maintaining sensor integrity. Dual internal talc seal makes Our Oxygen sensors last longer. Breathable Teflon membrane allows increased air flow for a faster switch rate to improve fuel economy and save the motorist money at the pump. Stainless steel shield protects the element from thermal shock and regulates proper air flow to ensure faster sensor response and better performance. Featuring the broadest sensor coverage in the market, we meet the service professionals needs with the highest quality product every time he opens the box. As a global manufacturer of emission components, complete quality control is maintained through the manufacturing process from componentry to finished product.