TPO PVC Roof Waterproofing Membrane Hot Air Welding Machine 230V/4200W; with US Twist Lock Plug; for Welding PVC/TPO; Ship by DHL FedEx, Can Get Machine in 4-6 Days Anti-scaled protection design with maximizing heat volume and air volume to ensure the welding quality and improve the operation efficiency Belt and pressure rollers can be transformed that balances the pressure and stable walking, which keeps perfect welding seam Accurate positioning system ensures walking straightly without deviation by adopting guidance positioning wheels microcomputer chip control system which makes operation easily and intuitively