Key Product Features and BenefitsAdvanced Butyl Material: Exclusive Michelin butyl compound offers excellent resistance to diffusion for extended air retention and dependable performance. AIRSTOP® tubes help provide the same high quality seal found in Michelin®AIR X® radial tires.Circular Extrusion Manufacturing Process: A Michelin exclusive, AIRSTOP® tubes are formed without a circumferential splice, resulting in fewer joints and a more uniform tubewall thickness after inflation. This helps provide optimized reliability at a minimal weight.Built-In Balance: All AIRSTOP® tubes are manufactured to exacting balance tolerances (without correction), which meet or exceed all industry standards. This eliminates the need to further balance the wheel assembly in order to compensate for balance irregularities in the tube. Easy Installation: Tube lubricant is factory applied to the tube exterior for easier installation and to help minimize foldover after installation and inflation. In addition, molded vent ridges help channel trapped air back to the valve stem for easy release. Low Temperature Performance: AIRSTOP® tubes are designed to perform in the extreme low operating temperature of minus 48 degrees C, so you can confidently fl y in cold weather with consistent, reliable performance.