... and barrel 1.Quality Material Used 2.Custom Production 3.Wear-resistant 4.Bimetallic & Nitrided abs,pvc,pp,pe,pa conical twin screw ... steelTechnology: nitrided treatment, alloy coating spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS .etcDepth of Nitrated Layer: 0.5-0.7mmHardness ... Measurement:The Reference Pictures of Screw Barrel abs,pvc,pp,pe,pa extruder machine twin screw and barrel