Specialized Plastic Extruder Filter Screen Supplier in Asia. 1.Material:SS302#\304#\316#\316L... 2.Usage:plastic extruder Description of Filter Discs for Double-screw Extruder:Material: SUS202, 302, 304, 304L ... , soda, corrosion, high temperature etc.Appication: Specially used in Double-screw Extruder.