The Bosch Windshield Wiper Blade - 40521 is a high-quality wiper blade designed for use on vehicles with a flat windshield. It is made with a precision-cut natural rubber wiping edge that ensures a smooth and streak-free wipe every time. The blade also features an aerodynamic design that reduces wind lift and noise for a quieter and more efficient wiping performance. It is easy to install and comes with a pre-installed universal adapter that fits most wiper arms. The Bosch Windshield Wiper Blade - 40521 is durable and long-lasting, providing excellent visibility and safety in all weather conditions.