... -head, and spiral flow-channel, which features stable extrusion, easy remove fusion line and adjustable.Vacuum calibrator: vacuum spraying water tank, ... , tank body is made of stainless steel.Haul-off unit: double-belt or rubber haul-off unit to satisfy the different ... easy operation.)The pictures shows the HDPE six-layer co-extrusion pipe machine, the Min. thickness of single layer is around 0.12mm ...