Two 5" heating sections and two 5" cooling sections made of laminated Teflon allow greater flexibility in sealing materials up to 500°F (±2°). Designed for a range of laminates of nylon PE PP kraft/PE foil and Tyvek®/polyester. For use with seals 1/8" 1/4" or 3/8" W without bag top trimmers. USDA-approved.