Manufactured by our special technology, our endless cold-rolled spirals have the following features compared to traditional spirals: 1 Good smooth finish, uniform shape and high precision. Its conducive to material conveying, reduce the product damage, and to increase the transporting efficiency. 2 Easy to installation, improve the work efficiency and reduce the production cos. 3 Under the physical and chemical surface treatment, the spirals enhances the anti-rust property and improves the appearance of screw conveyors. 4 After cold rolling, the spirals will be hardened, which will enhance greatly the rigidity and the wear-resistance, say by one time. The HB value is 240. Aside from endless cold-rolled spirals, we also produce new designed UHMW-PE spirals, which has the features of high intensity, ultra wear-resistance, anti-corrosion, it increases the durability of conveyor trough. Our plastic spirals accord with national food safety standard, especially applicable for those easy broken or corrosive materials