1,Single-screw 2,Good quality 3.durable in use Single Screw Extruder45/30 Single-screw Host1.1 Screw Screw diameter: 45mm ... Screw Aspect Ratio: 30:1 Screw speed ... , Plastic blowing machinery , Steel pipe anticorrosion production equipment , Single screw extruder , double screw extruder , greenhouse equipment , Mulch ...