... 2mm thick main frame Size:12"-24" K-401 Universal Wiper Blade Material ConstructionMain frame: all metal, plastic bushing design, ... China, with over 30years' experience in making wiper blade, wiper refill, wiper arm, linkage, wiper motor, washer tank, washer nozzle and washer ... bus manufacturers. We accept OEM/ODM orders, and make wiper products or other complicated products according to samples or ...