This adapter is 3" Tri Clamp/Tri Clover compatible to a 1" Female NPT Fitting. These adapters give you the ability to add compression fittings, compressed air fittings, and temperature probes or stainless braided hoses that have a 1" Male NPT thread to any system that is Tri Clamp/Tri Clover compatible. This adapter is manufactured out of 304 food grade stainless steel, and meets all of todays sanitary standards.