1. More than 20 years manufacture in packing machine 2. 10 years Made-In-China supplier 3. 100% QC inspection before shipment 4. 12 months warranty 5. Product Certificated by CE The automatic powder screw feeder is mainly used for the conveying of plastic and powder. The contact part of the screw feeder with the material is made of stainless steel, which is food grade. It can be used with various specifications of extruders, high-speed mixers and plastic mixers. It is widely used for feeding various powdery, granular, recycled and crushed materials.