Bosch Aerotwin Wiper Blade Bosch is the world's most trusted manufacturer of automotive wiper blades. Responsible for pioneering the one-piece wiper blade design, the Bosch Aerotwin Wiper Blades Set features an aero spoiler design that creates down-force against the windscreen to prevent undue movement and wiper vibration. As with all Bosch Wiper Blades, the Bosch Aerotwin Wipers are designed to exact OE fitment specifications. The lack of pivots and moving parts used in Aerotwin Wiper Blades mean that there is no flex, chattering, noise and a significantly longer service life than your vehicle's OE wiper blades. The Quick-Clip connector allows quick and easy installation. Note: This set contains 1 wiper blade.