They are manufactured by Zhejiang Sailing Steel Industry Co., Ltd. Investment Casting Threaded Fittings is a kind of fittings, which can be used in the fields of petroleum, chemical industry, power industry, and so on. Investment Casting Threaded Fittings are used in many industries. They are often required because they are made to very high standards and they have a long life span. Investment Casting Threaded Fittings are made from stainless steel, brass, and aluminum. They are used in the process of Investment Casting for connecting pipes and other parts with threads.