The product is a NOS (new old stock) GM PCV valve with part numbers 6487503 and CV768C. It is a vintage part that fits various GM models from 1965 to 1984, including Buick, Chevrolet, Cadillac, and Pontiac. The valve is made in the United States and comes with a California Prop 65 Warning due to its potential to cause cancer if ingested. It does not have a manufacturer warranty, and its surface finish varies. This non-performance part is a valuable addition for collectors or restoration projects of classic GM vehicles.