... plastic products. Specificationscarbon black n220 n330 n339 n550 n660 FREE SAMPLES carbon black n220 n330 n339 n550 n660FREE SAMPLESWe supply diverse model carbon black, for example N220, N330, N550, N660, N339, etc. 1. Type: n220 ,n330,n550.n660.2. Cas ... +/-1.3-1.7 +/-1.3-3.5 +/-1.3 carbon black N220, N330, N550, N660, N339,