Film Blowing Machine 1.two heads, 2.can increasing capacity, 3,saving energy, ... and corrosion resistance.,Scientifically designed, this machine set has two heads for one extruder with such advantages as increasing ... 55mm60m65mmScrew Ratio (L/D) 28:128:128:1Screw Speed 10-110r/min10-110r/min10-110r/minMax.Output 40kg/ ... x 2600 x 3400mm Our company: High Speed,Automatic Double-head Film Blowing Machine