Bosch Twin Truck 3397018170 Original Equipment Replacement Wiper Blade - 27" (Pack of 1) Smooth, quiet operation with 20% longer performance life vs. other premium wiper blades Exclusive weather shield connector system is pre-installed to protect arm connection from snow/ice build-up Dual precision-tensioned steel springs help create tension memory, applying uniform pressure along the entire blade length Dual precision-tensioned steel springs help create tension memory, applying uniform pressure along the entire blade length Exclusive FX dual-rubber-technology flex element resists ozone damage and hardening