Western Aircraft WS600 Pressurization Test cart for Aircraft. Max Diff Pressure is 7 to 8 so it wont pressurize to max the citations and larger aircraft but is good for leak checks and such. Will pressurize smaller aircraft such as Cessna 425 and others like King Air. This is low profile only 2.5 Ft high and 4 feet long. 150 to 350 CFPM.