Reproduction of the original five blade fan designed for use with various 1965-70 Mustang small block V8 models as listed below. Each fan blade measures 17 diameter with 5/8 center hole. No fan clutch required for installation.Ford Applications:1965-1965 Ford Mustang (289) (with AC)1966-1967 Ford Mustang (289) (with PS & TE (Thermactor Emmissions)1969-1970 Ford Mustang (200 250) (with AC)1965-1965 Ford Falcon (289) (auto trans)1966-1966 Ford Falcon (289)1967-1967 Ford Falcon (170 200 289) (with or without T/E) (Thermactor Emmissions)1969-1970 Ford Falcon (170 200) (with A/C)Mercury Applications:1966-1966 Mercury Cougar (289)Note:This fan is mounted without a fan clutch.