Specification :

N220: It has low particle diameter, good reinforcing property, good wear resistance; smooth surface, low heat production, high surface activity.
N234: 10% higher wear resistance than N220, good wear resistance. Mainly used in high-speed tire tread and rubber products.
N326: Has fairly high tensile strength, tear strength and wear resistance. It is mainly used in tire tread requiring high strength and low heat production.
N330: Good reinforcing property to rubbers, more mileage than normal or low-structure carbon black; higher heat production. Used in tire sidewall.
N339: Its reinforcing property, wear resistance is near to those of N220; especially suitable for the Styrene- Butadiene Rubber and cis-1, 4-Polybutadiene rubber system.
N375: Similar to N339, but has slightly lower heat production. Mainly used in the tire tread of saloon sedan etc.
N550: It is a high-structured carbon black used in the tire body and tire sidewalls.
N660: Average particle diameter is 49- 60, strong cohesive force, good flex fatigue resistance, good processability; it has fairly high tensile strength, high elasticity and low heat production etc. It is suitable for the tire sidewalls, tube tyre, buffer layer tire etc. It is also used in non-tire rubber, such as pigments, printing ink, paper and plastics etc.

N774 Particles of Wet Process
N326 Particles of Wet Process

For more details, please feel free to contact me via anchemical AT hotmail dot com.