These double automatic impulse sealers come with a 5mm or 10mm wide seal. The sealing elements on both the upper jaw and the lower jaw of these units allow for sealing thicker bags (up to 20 mil per side) such as gussetted coffee bags. I Available in 6", 12", 18" and 24" wide models. They are equipped with an electronic timer and an electromagnet for opening and closing. They operate on impulse sealing; controlled by a plug-in transistorized circuit board. Auto sealers have programmable timers for heating, congealing and recycling cycle that, once set, will give you consistent seals automatically. Use the wider seal widths for the more robust liquid tight seals needed for food products. Our sealers seal poly bags and any thermoplastic material such as polyethylene (PE) and polypropylene (PP) quickly and efficiently. Other materials also may be sealed. No warm up time is needed.