1.Automatic bag-making counting and automatic. 2.With accurate photoelectric eye trarking,the machine can automatically stop when bag making error exceeds 4 pieces. 3.The bag making length is controlled by the button switch. use: It is used for making various low density polyethylene(LDPE),high density polythylene(HDPE) natural bags and color printed bags,which are widely used for packing food,garments,industrial products and electric appliances etc.