... KMD-50KK Screw Barrel For Plastic MachineFor good plasticizing effect,we have different designs of Bimetallic Twin screw and barrel for plastic extruder machine ... ,nickel,tungsten,molybdenum Types of screw Gradual type,mutant type,wave type,barrier type,double screen type,shunt type,separation ... type,exhaust type,pin type,mixed type,double-head type,three-head type,multi head type etc. ...