Classy material: the heating elements are made of high-quality alloy, featuring high resistivity, low resistance temperature coefficient, high temperature durability, excellent corrosion resistance against high temperatures, rapid heating capabilities, and resilience, making them less prone to breakage. Easy to operate: installation requires only a screwdriver for most machines. Consider replacing old elements for improved bag sealing functionality in daily use; replace the kit when the sealing cloth shows signs of wear, discoloration, or diminished sealing effectiveness. Appropriate size to use; please check the dimensions carefully before purchasing. Applicable situations: suitable for most machines with number 400 included in their model number, such as compatible models F-400, -400, -400. Type: 400 Type Colour: Silver Material: High-quality alloy Size: 455 x 2mm Package Contents: 10 x impulse sealer heating elements 10 x corresponding sealing tapes Only the above package content is included; other products are not part of this offering. Note: Lighting and different displays may cause the item's color in the picture to vary slightly from the actual product. Measurement tolerance is +/- 1-3cm.