... sample can be provided. factory price carbon black N220, N330, N550, N660 Carbon Black Type: N220, N330, N550, N660Carbon Black N220Characteristic: Good abrasion resistance ... ; Tube; Extruding bar, seal and mould rubber product. Carbon Black N660Characteristic: It features lower reinforcing ability, smaller structure, higher lips ... 1.3-1.7 +/-1.3-3.5 +/-1.3 factory price carbon black N220 for pigment