Machine's material: The whole structure and vacuum chamber of DZ-400/500/600-2SB Double-Chamber Vacuum Packing Machine is made of 304 Stainless Steel. Technology Parameters Model DZ-400-2SB DZ-500-2SB DZ-600-2SB Power Supply 380V,415V/50-60Hz 380V,415V/50-60Hz 380V,415V/50-60Hz Power Consumption 0.75KW 1.5KW 3.2KW Chamber Size 510 ?490 ?120mm 620 ?560 ?140mm 720 ?560 ?150mm Sealer Size 410 ?8mm 510 ?8mm 600 ?8mm Exhaustment of Pump 20m3/h 40m3/h 40m3/h Vacuum Pressure 1.0Kpa 1.0Kpa 1.0Kpa Machine Size 990 ?640 ?1000mm 1250 ?705 ?1000mm 1450 ?705 ?1000mm Machine Weight 154Kg 207Kg 245Kg