... China, have specialized in the field of injection and extruder machine parts.Features of products 1. Highly Standard Modular DesignedThe ... .Low NoiseAll key components are finished by precisely machining, accurate assembly, and finally tested, and therefore, fairly low noise is ... Reference Pictures of Screw Barrel : Series double screw gear box for extruder machine(PVC, PP, PE, PA, PC, ABS .etc)