The AIE Double Impulse Automatic Sealers can seal up to 20 mil gusseted or regular thermoplastic film which is up to 40 mil total thickness. Selector switch controls your choice of a single heat seal or double heat seal. Separate programmable timers for heating, congealing and recycling cycle. Create perfect seals every time. Foot switch included for manual operation or program recycle time for continuous automatic operation. Included is a manufacture's parts kit consisting of 2 elements.