ClearPlus 11131 Sentinel Wiper Blade, 13" (Pack of 1) Designed with more pressure points than most other frame blades in the market - this allows for better contact, pressure distribution and wrap around on highly curved windshield To provide quiet, chatter, streak and smear free wiping in both directions, the Sentinel Series uses highest grade all-natural rubber formulation, precision slitting and molybdenum coating on rubber surface All metal, galvanized steel frame with embedded riveted hinges provides durability against rust and corrosion and safety in rough, stormy wiping conditions Universal adapter is pre-installed on the frame for all popular wiper arm styles Meets or exceeds all safety and durability standards established by the Society of Automotive Engineers