... is different specifications stipple on the mirror base plate and belong to Glass Series.The specification:4'x8' (1220mm* ... ' (1830mm*2750mm)6'x12' (1830mm*3660mm ProductsGalvanized steel plate of Q235A/B, Q345A/B, SS400, S235JRApplication for metallurgical ... , military (armored) construction, outside engineering, machine tool base, automobile rear of productsManufacturer standardGB,ASTM,DIN,JIS,BS, ...