全部采用1.5mm优质钢板材料加工制作。整体美观，表面采用静电喷涂粉末处理，有良好 的防潮、防腐等性能。

Are all made of 1.5 mm of high qualified steel plate material processing production.General appearance, the surface adopts electrostatic spraying powder processing, has the good moistureproof and anticorrosive performance, etc.