Feature Benefit   Specially blended rubber wiping edge Reduces haze and streaks; Quieter operation; Improves wear resistance    Specially blended rubber compound Improved flip-over flexibility Reduced windshield "chatter" Improved resistance to ozone, UV rays and road chemicals   Exclusive fully-enclosed metal tension spring  More direct pressure to the wiping edge for improved mositure control Better protection against water, snow, or ice build-up for improved all-sean wiping performance    Aerodynamic all-steel frame Blade contact at all speeds Superior corrision resistance with a zinc dichromate primer    Pre-installed Adaptor Preinstalled universal adaptor eliminates the need to select and install more complicated adaptor systems.         Bosch Micro Edge Excel is the most advanced wiper technology system ever.   The performance of Bosch Micro Edge Excel is unsurpassed. This advanced wiper system utilizes an improved revolutionary dual rubber technology for optimal function and performance.   A Bosch blended rubber is formulated for the body of the wiper element to keep it flexible. A second rubber is specially formulated for the wiping edge for optimum cleaning and a longer performance life in all types of climate extremes, including sun, salt, cold, ozone, and ultra violet rays.   And, Bosch Micro Edge Excel is built on an aerodynamic all-steel frame to work with the wind, keeping it in contact with the windshield at all speeds.    Part# Size Cost 40916 16"  $6.98 40917 17" $6.98 40918 18" $6.98 40919 19" $6.98 40920 20" $7.96 40921 21" $8.41 40922 22" $8.71 40924 24" $13.39 40928 28" 17.48