1JS-4520 Heat Shrink Machine Tunnel 2.used for sealing and shrinking food,dialy products etc 3.competitive price JS-4520 Heat Shrink Machine Tunnel (PVC and POF Film) Application:It is commonly used for sealing and shrinking packaging various products, such as general foods, electronic products, stationery, gift boxed, daily appliance, medicine, salted products, hardware, tools, bamboo and wood ...