Product name: PVC film for Automatic shoe cover dispenser Model No.: 28-1000 Working principle: It uses the principle that the thermo shrinkable film will shrink at proper temperature. It only takes seconds to let the PVC film become shoe cover and cover your shoes. The shoe cover machine can automatically output and cuts the film and provide hot air. This cover shoes for machine can cover shoes of different sizes, a layer of film will cover the lower part of the shoe. http://www.quen-tech.com/