... rich primer and 2 layer antirust paint( total thickness: 100-120um); Warranty period: 18-20 years ... Hot-dipped galvanized, when the thickness of parts is less than 5mm,thickness of hot-dipped gal is more ... than 65um; when equal to or more than 5mm, ... Glass wool, Rockwool, PU, etc.)they have different thickness(50mm,75mm,100mm, 200mm), density, color, type, etc ...