Original factory marked C9ZE-8A528-C, for the big 6-cylinder w/ or w/o A/C air conditioning. Stamped steel 1-sheave pulley w/ [FoMoCo] boxed logo, shaft bore of ¾”. Features straight flanges, production black paint that does not appear to have been resprayed, no pitting even in the groove. It’s an OEM Ford item w/ correct form & fit, install it now just the way it is, on a survivor or nice driver type SportsRoof / coupe / convertible.