black carbon inside conductive polyester fiber filaments 50D/8F sandwich type for anti static harness cord a) cross section: sandwich type. b) conductive materials: carbon grains. c) surface resistance: 10^6 ohm. d) thickness: 50D e) filament(s):8F Application: Embeded this conductive filaments into the fabric of anti-static work wear and cleanroom garments by regular grd/stripe , this fabric could electro static discharge . * Dustless fabric * linings of top grade suit * Anti-static kniting gloves * Anti-static fabrics * Anti-static single yarn drill and ply-yarn drill * Anti-static filter felt . * Anti-static harness cord. Packaging & Shipping 500-800grams/bobbin, is not even net weight. 16 or 24 bobbins/carton Could ship by international express or by general air transportation or by sea.