Manufacturer, Fabricator and Distributor of Fluid Power Components For nearly 50 years, HFI Fluid Power Products has been a leader in domestic hydraulic adapter manufacturing of both SAE standards and customs. HFI Fluid Power Products has fabricated OEM hose and tube assemblies for virtually every large agricultural and mobile equipment supplier in the U.S. HFI Fluid Power Product's distributor operations supplies no less than 80 major product lines encompassing air prep and pneumatics, valves, clamps, cylinders- pretty much anything pertaining to fluid power automation.