Sunny Scientific International manufactures Self Sealing type Thermoplastic Film. Sunny Scientific International offers a wide range of Scientific Instruments and General Lab requisites for various industrial applications. The Self Sealing type Thermoplastic Film available under the brand name "Parafilm" is used to hold moisture loss to a minimum and offers superior protection for the contents of tubes, flasks and Petri dishes in scientific laboratories. The Self Sealing type Thermoplastic Film comes in different sizes of 4 inch or 125 ft and 2 inch or 250 ft.