Carbon Black N339 is a grade of carbon black distinguished by: Surface Area: Medium, generally around 30-40 m/g. Particle Size: Coarser compared to higher surface area grades. Applications: Primarily used in rubber products, including tires, where it provides moderate reinforcement and good wear resistance; also used in plastics and coatings. Properties: Offers balanced reinforcement and dispersion with a solid black color. It's selected for applications where a combination of strength and cost-effectiveness is needed.