Stant 12270 30 Pound Cooling System And Pressure Cap Tester gives a chance to much more consistently check cooling sytems. Importantly, it allows you to test today’s car’s higher pressure cooling system and interpret it from a color coded dial making it easy to accurately test higher pressure caps and systems. This tester features a pressure release bar for releasing pressure build-up before removing the head from the neck, It comes in its own plastic case for easy storage and carrying. The set includes 1- 12559 spacer to drop in 1″ deep filler necks for testing, 1- 12552 cap adaptor to check standard “A” size caps, and a complete easy to use instruction manual.