... delivery Zinc:60-120g/m2 Details: Product namepre-galvanized steel pipeSpecification20mm-219mm*0.5mm-2.5mmMaterialQ195-Q235StandardsBS1387, GB/ ... , oiling, cutting, grooving, drilling, etc.Usage industryfence post, construction, architechure, agriculture and some other structure use. ... in construction, bridge, highway, windows of model steel door, machinery, chemical industry, supermarket goods shelf ...