Stant Engine Cooling System Pressure Tester Replacement Hose and Head Kit includes hose, head, and 1 inch spacer - does not include other kit components, i.e., pump, gauge, case, etc. Test kit replaces the standard radiator cap with specially engineered testing components that can help determine the health of cooling system components by revealing pressure dependent leaks or components on the verge of failure. Kit is capable of testing cooling system at up to 30 PSI - approximately double the normal PSI most cooling systems operate with. Stant is a world leader in the development and manufacture of fuel and cooling system products. Founded in Connersville, Indiana by George Stant in 1898, today the company is still based in Connersville, but is now owned by HIG Capital LLC. Stant designs and produces a variety of consumer products including thermostats, radiator and coolant reservoir caps. The majority of Stant consumer products are manufactured in the USA in TS16949/ISO14001 certified facilities.