... efficiency and energy saving, long service life. FEATURESSK Screw Air Compressor adopt Italy PRACTIKO PACK system, this system ... efficiency 10-20% higher than the 4/8 teeth screw.Air Inlet ValveAdopt Italy VMC patented compressor valve technology ... ControllerHumanity design, English and Chinese digital display, touch screw control, fully-automatic operation,CoolerLow temperature variation design, ...