Conical Twin Screw and Barrel/Cylinder for PVC ceiling panel Size: 45/90, 51/105, ... the flight, prolong life of screw. Easy wearing parts of barrel feed inlet made from imported anti-wear alloy can be ... improvde abrasion performance. Twin screw and barrel made: CINCINNATI, BATTENFELD, KRUSSMAFFEI, BAUSANO and AMUT model spares ...