1,carbon black N220 2,rubber grade 3,free sample 4,good quality and competitive price 5,manufacture 1,Carbon black(1)N330 mainly used in the tread rubber, the curtain cloth rubber, radial tire,bias tire,sidewall rubber and other high quality rubber products.(2)N220 is suitable for each kind of rubber, It has mainly been used in the carrying tyre, tread rubber, and rubber product with high ...