We one of the biggest manufacturer and very famous in China. 1.material (PE, PC) 2.Adhesive 3M 3.Film+Glass 4. Plastic A ... 2. Good material control to make sure all the material are high quality ,all the material we used are Rohns compliant 3 ... do different types of assembly,such as membrane switch and touch screen with FPC, PCB ,silicone rubber ,metal backer ,plastic bezel and so ...