1.quality control:ISO9001:2000 2.guarantee quality 3.Expo exhibition 4.JB/T3943.1-1999 criterion tungsten carbide Copper wire drawing dies 1.the wire haves high wear-resistant 2.the wire haves superior resistance to pulling name carbide copper wire drawing dies model according to customer requirement the min order 1 piece standard ISO9001:2000 criterion JB/T3943.1-1999 experience 20 years exhibition expo exhibition payment L/C or T/T material tungsten carbide