... 2.Material:PVC 3.Certificate:CE,ISO 4.Extruder:conical twin YF series PVC non-profiled material production line is mainly ... holes, nine holes, etc). for different sectional surface and molds, twin parallel(conical)screws extruder of different specifications can be chosen ... choose such specifications as 4-meter, 6-meter, etc. with twin parallel screws extruder, it is particularly suitable for high speed ...