PPHDPE BOX STRAPPING, SUTLI & MONOFILAMENT PLANT SCREW BARREL PHDPE Box strapping plant Sutli plant Monofilament plant Our Highly precised zero tolerance (0.1) and fair price policy make us the most reliable screw barrel manufacturer for plastic pipe extrusion industry. Material: EN41B nitriding steel Gas Nitriding: Thickness from 0.5 to 0.7 mm, hardness ~ 60-70 HRC ~ 1000 HV. Production time: Within 4 weeks depending on the complexity of the part