Classy material: Made of chromium, featuring high resistivity, low resistance 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 heating element to improve bag sealing performance during daily use. Replace the kit when the PTFE cloth shows signs of wear, discoloration, or reduced sealing effectiveness. Appropriate size for use; please check dimensions carefully before purchase. Applicable for most machines with "400" in the model number, such as F-400, -400, -400. Type: 400 Type Color: Silver Material: Chromium Size: 455 x 2mm Package Contents: 10 x Impulse sealer heating elements 10 x Corresponding cloth tapes Only the above items are included. Note: Lighting and display settings may cause slight variations in color. Measurement error allowance is +/- 1-3 cm.