Double Impulse Hand Sealers come with top and bottom heating elements for applications that require the sealing of thick bags. These heavy duty hand operated sealers can seal up to 20 mil density material. Excellent for plastic lined, foil and gussett bag.Features: 1. Heavy duty hand operated 5 mm and 10 mm wide double seal. 2. Up to 20 mil density material. 3. Heavy duty transformer for heavy duty production. 4. Ideal for very thick and gussett bags. 5. Strong cast aluminum housing. 6. Portable bench top model.