... 2 easy operation 3. pipe diameter 16-40mm PVC dual pipe production machine:1) It is ... mainly used in the manufacture of PVC pipes with various diameters and wall thickness in ... etc.2) The set is composed of conical twin-screw extruder, vacuum cablibrating tank, haull-off, cutter, ... No. Description Quantity1.SJSZ-51/105 Conical Twin Screw ExtruderOne set2.Twin-tube Moulds(Φ16mm,Φ20mm,Φ25mm,Φ32mm, Φ ...