Classy material: Made of chromium, featuring high resistivity, low resistance temperature coefficient, high heat 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 regular use. Replace the kit when the PTFE cloth shows wear, discoloration, or reduced sealing effectiveness. Appropriate size for your use; please check dimensions carefully before purchase. Compatible with most machines that include the number 400 in their model number, such as F-400, -400, and similar models. 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; others are not part of the package. Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3 cm.