Shandong Yuntai Machinery Co., Ltd.is a professional manufacturer of harrow discs and plough discs. There is an existing advanced production line of forging, casting, machining, heat treatment in the company. We can produce discs made of qualified spring steel 65Mn from 254 to960mm in diameter and from 3 to 12mm in thickness. The products export to Europe, America, Australia, Southeast Asia and other countries and regions, all the year round and enjoy good fames in the user.