The AIE manual double impulse sealers utilize top and bottom sealing elements for heavy duty applications that require more heat than a regular hand sealer can give. Great for sealing thick material and gusseted bags that are over 10 mil and up to 20 mil on each side. They are available in 12" length with a 5mm or 10mm wide seal. These have a strong cast aluminum housing. Included is a manufacture's parts kit consisting of 2 elements.