This machine solder in L the folded PVC film coil with the package inside. The PVC film is shrink-wrapped to fit the package in a hot air tunnel. Placing the package in the welding area is manual, the lowering of the welding element is manual and the advance of the package up to and within the shrink tunnel is automatic. Tunnel speed and temperature adjustable. Model: SL450 Tunnel length: 620 mm Tunnel width: 450 mm Roll width: 480 mm.