Alliance Plastics APMW-20805 20"X5000', 80 Gauge Cast Machine Film, Per Roll. SteelFlex Cast hand and machine film is your everyday choice to handle your traditional loads. With a quiet release and high puncture resistance, users will enjoy the ease of application. Lock your loads in place and have peace of mind that Steelflex will get your load to your destination safe and sound. Great Cling Package; Excellent Load Retention. High Puncture Resistance.