1971 - 1973 Mustang Cougar Water Pump Pulley original FOMOCO. It was a service replacement for 70 351 P/S non A/C cars and 1970 Boss 302 Cougar and possibly many others. Super clean condition, no rust, pits or dings. Many applications, check your application before purchasing. 
Measures 6 15/16" diameter - 2 7/8" O.A. deep

Thank you for looking.