This film blowing machine has two die heads., increasing production capacity, saving energy, labour and workshop area, etc. Characteristics:T his machine set is used ... -55Fm-600Sj-60FM-700Sj-65FM-800Diameter of screw55mm60m65mmScrew Ratio (L/D)28:128:128:1Screw Speed10-110r/min10-110r/min10-110r ... x 3000mm5000 x 2400 x 3200mm5200 x 2600 x 3400mm Double-head Film Blowing Machine