It is very important for size: there are two impulsive sealing agents on Amazon, so you need to pay attention to the premium and maintenance sealing measurement measurement must be a hole. As our picture, for your reference on your detailed information page !!!!! Pulse sealing PTFE strip size: It is suitable for the size you use, please carefully check the size before buying. High -quality materials: Heating elements are made of High-quality materials, with high resistivity, low resistance temperature coefficient, high temperature use, good corrosion resistance, high temperature, rapid heating, durability, and not easy to rupture. Easy to operate: Only requires screwdriver to install on most machines. Please try to change the old elements to have a better bag sealing function in daily use. It is not good to replace the kit when replacing the color or sealing effect on the PTFE (cloth) warning. size: 33cm x 2mm / 43cm x 3mm / 23cm x 2mm Material: Metal colour: As shown Package Contents: 6 x Heat Seal Strips 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. The measurement allowed error is +/- 1-3cm.