... special design for extruder, based on 38CrMoAlA. conical twin screw and barrel for plastic extruder, granulator or pelletizer Ruian ... and ability to give the best product with excellent quality for our customers.size: 35/75, 45/90, ... /188, 95/188Material: 38CrMoAlA high quality alloy steelTechnology: nitriding treatment, alloy coating spraying, heating treatment, screw fully hardeningDiameter: Φ45-Φ200( ...