... nut, screw, ring, wire, foil, sheet, rod, tube Tungsten nickel iron alloy plateApplications: * For producing electric light source parts,components of electric ... ) x 100~1000mm( Length )Purity: 99.95%,99.99% and 9.999%Standard: ASTM B760 or GB3875-83 ASTM B760 ... certified ISO9001:2000 company, we have strict quality control system and provide professional service to our customers around the world. ...