Classy material: the heating elements is made of chromium, features with high resistivity, low resistance temperature coefficient, high temperature of , good corrosion resistance against high temperature, fast heating, durability and not easy to break Easy to operate: require just a screwdriver for installation on machines, try to change the old elements to have a better bag sealing function in daily , replace the kit when the PTFE (cloth) is warning, changing color, or the seal effect is not good Appropriate size for you to , please check the size carefully before purchase Applicable situations: suitable for machines with the number 400 as part of their number, for example, with F-400, -400, -400 Type: 400 Type Colour: Silver Material: chromium Size: 455 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 and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.