carbon black n220 n330 n339 n550 n660 FREE SAMPLES we are Manufacturer SGS for quality and quantity Name ,ParameterCarbon black N220Carbon black N330Carbon black N550Carbon black N660Loding ... % max0.10% maxused in plastic,rubber,masterbatch,tire,paints,ink,pigments Carbon black N220,N330,N339,N375,N550,N660,N774 etc...... 2012 WEIYI ...