Classy material: the heating elements is made of Nickel 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 break Easy to operate: require just a screwdriver for installation on most machines, try to change the old elements 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 good Appropriate size for you to use, please check the size carefully before purchase Applicable situations: suitable for most machines with the number 400 as part of their model number, for example, compatible with F-400, FS-400, PFS-400 or Applicable situations: suitable for most machines with the number 200 as part of their model number, for example, compatible with f-200, fs-200, pfs-200 and more Type: 400 Type or 200 Type Colour: Silver Material: Nickel chromium Size: 455 x 2mm or 240 x 2mm Package Contents: 10 x impulse sealer heating elements 10 x corresponding cloth tapes Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.