... others. K-308 All season Windshield Metal Frame Universal Wiper Blade Material ConstructionMain frame: 1.2mm thickness galvanized ZINC ... rubber blade, with Teflon coverage Durability test requirements:Effective wiper 75% after 500,000 cyclesRemain function after 1, ... China, with over 30years' experience in making wiper blade, wiper refill, wiper arm, linkage, wiper motor, washer tank, washer nozzle and ...