Quickly and efficiently seal polyethylene or polypropylene bags, sheets or flat tubing. Sliding blade removes excess material 19 mm from the seal.Timing knob ensures safe sealing. Simply turn knob to set time (1-8 seconds), press handle down and remove when light indicates cycle is complete.Includes replacement part kit: two extra blades, two extra heating elements and two extra PTFE cloths.Additional replacement part kits can be ordered separately.