... Product Description TWO COLOR FILM BLOWING MACHINEMODEL: 40/500Which can produce special LDPE film, different color on each half of film. Screw diameter: ... - 55/650Which can produce special LDPE film, different color on each half of film. Screw diameter: 55mm Die head diameter ... special type die , air blower use inverter control, double rewinder use inverter control tension, hydraulic screen changer, ...