Suitable for most (but not all) impulse sealing machines that are marked "12-inch" machines or have "300" as part of their model number, please make sure that the size of your sealing machine is consistent with the product size! 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 eak 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 to use, please check the size carefully before purchase The actual product may have slight color differences or differences, which does not affect use. Colour:Photo Color Material:nickel chromium Size:About 34cm 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 reflection and different displays may cause the color of the item in the picture a little different from the real thing.