LINK-CHAIN:

1) The materials of CHAIN:Carbon steel
2) The treatment of surface :Sand blasting;Painting;GAVANIZED

3) The standard of product:GB/T13472-1992 BS876-1995 DIN1041-2001 DIN1193-2000 4) The production/packing standard:ISO9001:2000/GB/T5350
5) The standard of quality control:ISO2895-1:1995 GB/T2828.1-2003