we specially manufacture and export insoluble sulfur and rubber chemicals in china. now we supply all types of superior insoluble sulfur with good quality and low price, including is 60 and is 90 series, oil-treated is7020 is7520 is6033 etc. of course, if you requirement, we are able to manufacture as your demand. our company own superior technology. certainly, our products have fully meeted demand home and abroad, and gained high reputation.