7 layers Alibaba Plastic Air Bubble Film Extrusion Machine Packaging & Shipping Packaging Details: Air bubble film and stretch film Delivery Detail: 30 days 7 layers Alibaba Plastic Air Bubble Film Extrusion Machine is to produce air bubble film. Optional Equipment: 1)Auto loader 2)Auto dry hopper 3) Quick screen changer 4)Hydraulic net changer 5)Air shaft 6)lamination rack with tension 7)Auto edge recycling system 8)Auto roll changer Main technical parameters: