DTH series are used for catalyst bed support for oil refining, petrochemical and natural gas applications. The working temperature range is mostly 100 to 1, 600 degree centigrade. As the product contains 99.3% alumina at minimum and 99.7% in general, it is frequently used as a catalyst bed support for chemical reaction towers in which foreign matters should be kept at minimum. Due to the nature of high alumina, this product is positioned at the highest place in our range of similar products. It is used mainly at the downstream of naphtha production, and is quite effective when it is used in strong acid/alkali environment and when inclusion of foreign matters should be kept at minimum. The product is in high demand for use in liquefied natural gas plants.