The VP600 utilizes 2 chambers for higher volume production over other models. The VP680 is equip with two 24-inch seal bars located in each vacuum chamber. This unit uses 2 Commercial-Grade 1.5 HP Rotary Oil Pumps. Unit comes with 4" casters for easy moving. Durable stainless steel exterior making cleanup a breeze! The easy to use control panel on the VacMaster VP600 lets you set the vacuum, seal, and cool time. Bag locks on the seal bar gasket reduce bag movement during busy production cycles. Maximum Chamber Bag Size: 20" x 28". Operates on 3-Phase, 220V, 30A (hard wire only, no converters. Gas flush comes standard on this model, you are not required to use the gas flush to operate. Contact us with any questions you have on this outstanding product!