... polar solventsHNBRKeep the feature of NBR, Heat Resistance, Oil Resistance and Weather Resistance are better than NBRACMKeep the ... resistance, Inorganic medicines Resistance and weather Resistance. But the oil Resistance is bad.SBRGood Polarity solvent resistance, weather ResistancePTFEHeat ... VF, VG, VM, VZ, KA, KB, KC, KF, KG, KM and KZ.4. Size: National standard, American standard, custom standard ...