These TOP QUALITY PROFESSIONAL GRADE impulse sealer are powerful units that seal bags for a great variety of industries and applications. Such as, retail, produce, grocery stores, and industrial sealing. They are affordable and easy to use, which makes them a great alternative bag sealing applications.The sealing process is simple: The operator places the bag over the sealing element and lowers the upper jaw thus activating the unit. The seal process quickly ends once the preset seal time is reached. The operator retrieves the sealed bag and repeats the process.