New Standard T-Series distributor rotor.  For Points distributors.  Stock replacement.  Fits the following:

67-75 Firebird/Trans Am w/ V8 326, 350, 400, 455 Pontiac engine

NOTE : About Standard brand products.  Part numbers appendixed with "T" at the end of the part number are their standard replacement parts, some vendors may call this "economy".  Part numbers without the "T" are their professional series.  Keep this in mind when comparing products/prices.