... .Servo driver for film pulling system.4.Photo sensor for automatic tracking eye marks.5.Date printer and film feeding system ... cracker,cakes,biscuits,frozen food,fried food,hardware,accessories,spare parts,toys and so on.Optional Function:1. Air flushing system2 ... length3. Bag shape4. Packing film material5. Machine frameStandard Bag Sample: automatic vertical packing machine (SK-200/220)