All of our machines are made of top quality products, it features 2T welding then milling built-in molding frame, Japanese 20CrMnTi CNC precision machining cam , 4-axis CNC machining clamp and aviation aluminum engraving and milling vacuum chamber, which make sure of your extended lifetime cycle of our machine. https://www.linpack.com/news/vacuum-packaging-machines-what-to-consider-before-making-a-purchase