With an innovative design from Bosch, the Aerotwin Retrofit Upgrade Flat Blade AR18U is the perfect marriage of function and form. The custom-designed evodium flex rails ensure a perfect fit for every vehicle and bring increased performance, even at high speeds and during extreme weather. The blade’s optimal aerodynamics have been designed to efficiently clear every portion of the swept range, while there’s minimum wiper-induced wind noise and an innovative connection that makes it easy to replace the blade. The Bosch Aerotwin Retrofit Upgrade Flat Blade AR18U is a maximum-performance blade that upgrades standard blades to flat ones and improves visibility. Thanks to a uniform force distribution (1000+ contact points), Bosch AR18U retro-fit blades produces perfect wiping performance at every point of the screen. Uneven wear is prevented by distributing application force evenly. Features & Benefits: Dimensions: 18” / 450mm Upgrades a standard wiper blade to a flat blade Twin dual-component technology for wiper blades Flat and elegant hi-tech spring strips replace conventional link and bracket arrangement Extended service life due to even distribution of force Fitting position: Front Replaces tradition hook and lock type fixings