Classy material: the heating is made of chromium, features with high resistivity, low resistance temperature coefficient, high temperature of use, good corrosion resistance against high temperature, fast heating, durability and not easy to breakEasy to operate: require just a screwdriver for installation on most machines, try to change the old to have a better bag sealing function in daily use, replace the kit when the PTFE (cloth) is warning, changing color, or the seal effect is not goodAppropriate size for you to use, please check the size carefully purchaseApplicable situations: suitable for most machines with the number 400 as part of their model number, for example, compatible with F-400, -400, -400Type: 400 TypeColour: SilverMaterial: chromiumSize: 455 x 2mmPackage Contents:10 x impulse sealer heating10 x corresponding cloth tapesOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.