Content≥：99.6-99.9（%）Inpurity content：0.4（%）

                                                   Weight：vary（kg/pc）

                                                    Grade：W1, WAL1, W2 

                              Diameter：0.8~30mm

                                                    Length：50~2000mm

                                                    Status：Y  R  M

                                                    Standar：GB/T 4187-84      ASTM F 288-90