... complicated blower. 3.The Film veversion process is entirely contactless. 4.High speed screw and Italy style Air-Ring ... L/D)1:301:301:301:301:30Screw &Barrel material38CrMOALA38CrMOALA38CrMOALA38CrMOALA38CrMOALADie-head diameterHDPE35,LDPE100HDPE45,LDPE160HDPE100,LDPE220HDPE120,LDPE250HDPE130,LDPE300Thermo ... 3030507575 If you have interest in our film blowing machinery,please feel free to contact us.