Clear Advantage™ 20″ Black Wiper Blade (20CA) by Bosch®. 1 Piece. Blade Type: Beam. Installation Type: Click-On™ adapter system. Clear Advantage is your ultimate choice in rain, sleet, and snow. The precision-tensioned mono steel delivers all-weather wiping performance with uniform pressure for consistent, high quality results. The special graphite coating on the wiping edge helps reduce friction, extending the wiper blade service life.