... , China.3.Nominal Diameter:1/2,3/4,1,1-1/4,1-1/2,2,2-1/2,3,4,5,6 4.Outside ... Diameter(mm):21.3mm-165.0mm 5.Wall thickness(mm):2.75mm-4.50mm 6.Zinc Weight:80-400g/m² 7 ... , d. Cutting head, e. Pickling, f. Grinding, g.Lubrication, h. Cold rolling, i. Degreasing, j. Solution heat treatment, k. Straightening, l. Cutting ... ±0.5mm2.7512%1.26203/426.8 2.75 1.6325133.5 3.25 2.42321- 1/442.3 3.25 3 ...