Rain-X® recently introduced a Heavy Duty windshield wiper blade for the more than 8.1 million Heavy Duty Class 3, 4, 5, 6, 7 & 8 vehicles currently in operation on American roadways. The new Heavy Duty wiper blade is made with a synthetic squeegee that is designed to withstand the elements and to provide a smooth, chatter-free wipe. The wiper blade also has a galvanized steel frame that provides long-lasting durability and protection against corrosion, It is also designed to apply even pressure.