N234's wearability is 10% more than that of N220. It can offer good performance in critical condition. It can be used in the hi-speed tread rubber & top-grade rubber products. Specifications: 1) Iodine absorption number: 120±7g/kg 2) DBP absorption number: 125±7cm3/100g 3) DBP absorption number of compressed sample: 94 ~ 110cm3/100g 4) CTAB surface area: 110 ~ 128cm2/g 5) Nitrogen surface area: 112 ~ 126cm2/g 6) Tint strength: 115 ~ 131% 7) Heating loss: ≤2.5% 8) Ash content: 0.5% 9) No.325 sieve residue: ≤0.1% 10) No.35 sieve residue: ≤0.001% 11) Tensile strength: ≥0.8MPa 12) Extension: ≥-10% 13) Modulus at 300%: 04±1.6MPa We also supply carbon black: N220, N326, N339, N375, N550, N539, N660, etc. Inner packing: PE bag, polybag Outer packing: 20kg/25kg in PP woven bag Other Price Terms: FOB, C&F, CIF Payment Terms: L/C at sight, T/T prepaid Certification(s): ISO9001