This unit is designed to seal plastic sheets, bags, or flat tubing. Safely seal polyethylene and polypropylene plastics up to 5mil thick. Sealers feature a timing knob for safe sealing. Simply set timing knob, press handle down on plastic, and remove when timing light indicates complete cycle. Heating element is hot only when sealing. The sealer includes a 6-ft cord for 115 VAC. Heat sealer for 12" seals measures 171⁄2 x 33⁄8 x 7".