... door, stainless steel and color steel two kinds,2.the use of PU as core material, ... polyethylene sliding wheels, low temperature rubber seals, the main pieces of molded stainless steel, aluminum rail ... galvanized screws all, reinforcement corrosion-resistant, easy to open and close, internal and external switch, ... steel or color steel plate.Note:1. to install anti-collision plate, door thickness of 50mm ...