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