The DV-200N PLATINUM 7 CFM Vacuum Pump is the Best Pump in the Industry. Designed for the Serious Air Conditioning and Refrigeration Technician, the PLATINUM Vacuum Pump Features a Gas Ballast and Blank Off Valve. American Made and Subjected to JB's Rigorous Performance Standards, the DV-200N PLATINUM Pump is Top of the Line for both Quality and Durability. Backed by an Unprecedented 24 Month Over-the-Counter Warranty, there is no Better Pump on the Market