High quality silicon steel door plank is to use natural quartz material, the use of imported equipment second ultra high temperature and the thickness of the product is the standard of 4 mm, colorful, light weight, high strength. Because of imported production equipment is expensive, high technical requirements. Fake fake products with low cost 5 mm ordinary tempered glass imitation, colour is cloudy, bubbles, come unglued. The weight of the door, installation of door hardware hinge is easy to bad, door sagging deformation, etc. Caused a lot of trouble for customers to use manufacturers and after-sales service.