... sample can be provided. factory price carbon black N220, N330, N550, N660 Carbon Black Type: N220, N330, ... rubber products and high load conveyor belt. Carbon Black N330Characteristic: Good abrasion resistance and middling ... Extruding bar, seal and mould rubber product. Carbon Black N660Characteristic: It features lower reinforcing ability, ... .5 +/-1.3 factory price carbon black N220 for pigment