All PIAA frames are aerodynamically designed to help keep the rubber on the glass at highway speeds. To protect against corrosion, the frames are first zinc-plated and then powder coated. The wiper frame is properly balanced to provide equal pressure on teh windshield, prlonging blade life and giving you clearer, noise-free operation. The PIAA Super Silicone Blade is truly outstanding - an activated silicone coating makes the windshield water-repellent, so rain beads-up and slips off the windshield. Aerodynamic Spoiler reduces lift at higher speeds, available in either flat black or attractive carbon fibre finish.