Classy material: The heating element is made of nickel chromium, featuring high resistivity, low temperature coefficient, high-temperature resistance, good corrosion resistance at elevated temperatures, fast heating, durability, and resistance to breakage. Easy to operate: Requires only a screwdriver for installation on most machines. Replace the old element to improve bag sealing performance during regular use. Replace the kit when the PTFE cloth shows signs of wear, discoloration, or reduced sealing effectiveness. Appropriate size for your application; please verify dimensions carefully before purchase. Applicable situations: Suitable for most machines with "400" in their model number, such as F-400, -400, PFS-400. Type: 400 Type Color: Silver Material: Nickel chromium Size: 455 x 2mm Package Contents: 10 x Impulse sealer heating elements 10 x Corresponding cloth tapes Note: Light and display settings may cause slight variations between the item color in the image and actual product. Measurement error allowance is +/- 1-3 cm.