Use heat sealers to make a seal on virtually any plastic sheet, bag, or flat tubing—seals PVC, polyethylene, polypropylene, and other transparent plastics. Simply set the timing knob, press the handle down on plastic, and remove when timing light indicates timing cycle is complete. Use the polyethylene bags to make almost any size package quickly and easily. Customize your bags with the polyfilm polyethylene flat tubing. Simply roll off the amount of polyethylene flat tubing, seal at the correct length, and cut off your bag.